The Medieval Origins: From Normans to Glasgow

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Project status: controlled medieval-origin hypothesis; architecture reviewed 29 August 2026. Claims remain subject to the evidence statement on this page.

The Medieval Origins: From Normans to Glasgow

This page examines the possible medieval origin of the principal Glasgow Y-DNA lineage and the proposed relationship between the Glasgow, Duffield and Churnside paternal lines.

The genetic relationship is supported at the level of shared Y-DNA ancestry. The identification of particular medieval ancestors remains hypothetical. No continuous documentary pedigree has yet been established from a Duffield family, John of Huntingdon, or any twelfth-century de Glasgu bearer to the later hereditary Glasgow surname.

For the complete documentary register of medieval bearers, source analysis and rejected identifications, see:

Bearers of the de Glasgu Name and the Emergence of the Glasgow Surname, c.1175–1500

Evidential status

The genetic framework

The current Y-DNA relationship can be summarised as follows:

• R-FT4811
  • R-FTA30932
    • Associated with tested Brown and Churnside paternal lines
  • R-FT32941
    • R-FT25406
      • R-FT20271
        • Associated with several documented Glasgow paternal lines
      • One or more additional downstream lines requiring further resolution

^{[1] [2] [3] [4] [5]}

This topology supports a genuine shared paternal ancestor between the tested lines. It does not identify that ancestor's surname, residence, occupation, nationality or social status.

FamilyTreeDNA branch dates are statistical estimates rather than exact mutation dates. An estimated date near the eleventh or twelfth century may represent a broad probability range extending across several generations. It should not be rendered as a precisely dated event such as “the Duffield mutation of 1070”.

R-FT4811 and the proposed Norman ancestor

The estimated age of R-FT4811 is broadly compatible with the period of the Norman Conquest and the subsequent movement of continental families into England and Scotland.

R-U106 and its descendant branches were, however, distributed among a much wider north-west European population. Membership of R-U106 does not by itself identify a man as:

• Norman rather than Flemish, Anglo-Saxon, Scandinavian or another north-west European origin;
• a knight;
• a participant at Hastings;
• or a member of a particular noble household.

The description of the R-FT4811 ancestor as a knight from Ferrières-Saint-Hilaire who fought at Hastings is therefore speculative. No documentary or genetic evidence presently identifies the ancestor that precisely.

A defensible description is:

The paternal ancestor represented by R-FT4811 probably lived during the central Middle Ages. His descendants later divided into branches represented among modern Glasgow, Churnside, Brown and related paternal lines. His personal identity and place of residence are unknown.

The Duffield hypothesis

Historical context

Duffield Castle in Derbyshire was associated with the de Ferrers earls of Derby. A castle existed there during the Anglo-Norman period, and dependants, tenants and officials of the de Ferrers family would have moved through their English estates.^[6]

This supplies a possible historical setting for a family using the locative surname de Duffeld or de Duffield. It does not establish that the ancestors represented by R-FT32941 lived at the castle or served the earls of Derby.

Roger de Duffeld

A Roger de Duffeld appears in the Yorkshire Pipe Roll for 1194. The entry concerns a monetary liability arising from his failure to produce a person for whom he had acted as pledge or surety.

The record does not describe Roger as:

• an administrator;
• a landholder;
• a castle official;
• a de Ferrers retainer;
• or a relative of John of Huntingdon.

The former description of Roger as appearing in a “1190 Yorkshire Poll Tax” is incorrect. England's principal medieval poll taxes date from 1377, 1379 and 1381.^[7]

The locative is also ambiguous. Yorkshire contained both North Duffield and South Duffield. A man recorded in a Yorkshire fiscal roll may have derived his name from either Yorkshire place rather than Duffield in Derbyshire.^[8]

Roger de Duffeld is therefore a genuine medieval bearer of the locative, but he cannot presently be assigned to:

• Derbyshire;
• Duffield Castle;
• the de Ferrers affinity;
• R-FT32941;
• or the ancestry of John of Huntingdon.

DNA limitations

No medieval Duffield burial has been genetically identified as R-FT32941. No publicly verifiable documentary male line currently connects a medieval Duffield bearer to the Glasgow Y-DNA cluster.

A modern Duffield surname match at or near R-FT32941 would strengthen the theory, but surname agreement alone would still not prove descent from Duffield Castle.

The label “Duffield mutation” should therefore be avoided. A neutral description is:

R-FT32941: the ancestral branch leading to the principal tested Glasgow cluster.

John of Huntingdon and the Glasgow episcopal household

Documented career

Master John of Huntingdon was a real late-twelfth- and early-thirteenth-century cleric associated with the household of Bishop Jocelin of Glasgow.

He appears in documentary sources as:

• Magister Johannes de Huntedun;
• a clerk in the Glasgow episcopal household;
• and later an official or senior legal administrator of the bishopric.

His career demonstrates that an educated English or English-associated cleric could enter Scottish episcopal service during this period.

Such movement was common within the Anglo-Scottish society created under David I and his successors. Clerics, knights, merchants and administrators travelled through cross-border royal, aristocratic and ecclesiastical networks.

The Huntingdon designation

John's designation de Huntedun may indicate:

• geographical origin;
• education or residence;
• an institutional connection;
• or association with a patronage network.

It does not demonstrate that he had previously used the surname Duffield.

No primary act presently:

• styles John as de Duffeld;
• identifies Roger de Duffeld as his brother;
• records an alias between Duffield and Huntingdon;
• or connects his property or office to a Duffield family.

Roger de Glasgu as a contemporary bearer

A charter from Bishop Jocelin's episcopate names both:

• John of Huntingdon; and
• Roger de Glasgu.

Roger witnessed a grant involving a Glasgow burgh toft and a fishing right in the Clyde.^[9]

The two men therefore belonged to the same broad Glasgow property and episcopal network. Their joint appearance does not establish kinship.

Roger's presence also demonstrates that the designation de Glasgu was already in personal use while John remained recorded as de Huntedun.

No surviving charter states that:

• Roger de Glasgu was John's son, brother or nephew;
• a later John de Glasgu was John's descendant;
• John changed his name from Huntingdon to Glasgow;
• or John's property or office passed to a de Glasgu heir.

Assessment of the immigrant-cleric theory

The following general mechanism remains possible:

1. An English-associated paternal line entered Scottish service.
2. A younger son or cleric joined the Glasgow episcopal household.
3. Later relatives or descendants became identified with Glasgow.
4. The Glasgow locative eventually became hereditary.

The records do not identify John of Huntingdon as the man through whom this occurred.

John should therefore be described as a possible participant in the institutional environment in which the surname developed, not as the proven immigrant ancestor of the Glasgow family.

The medieval de Glasgu evidence

The detailed medieval evidence is maintained separately at:

Bearers of the de Glasgu Name and the Emergence of the Glasgow Surname, c.1175–1500

That register documents:

• the known medieval bearers and spelling variants;
• the Dublin merchant group;
• the Glasgow, Dunkeld, Durham and St Andrews clerical networks;
• secular and civic bearers;
• the royal escheator Alexander de Glasgu or de Glasgow;
• explicit father-son constructions;
• disputed readings and rejected surname claims;
• the fifteenth-century transition towards a fixed surname;
• and the evidential limits of proposed relationships.

Its principal conclusion is that repeated personal use of the Glasgow locative is secure from the late twelfth century, but no continuous pedigree currently joins the separate medieval bearers.

The records are compatible with:

1. one dispersed hereditary kindred;
2. several unrelated people independently identified by Glasgow origin;
3. or a mixed model in which some bearers were related and others were not.

The mixed model currently requires the fewest unsupported assumptions.

Corrections to the former generational reconstruction

The former sequence presented named medieval bearers as a continuous descent:

1. John of Huntingdon;
2. Walter de Glasgu;
3. John de Glasgu;
4. Adam de Glasgeu;
5. Andrew de Glasgow;
6. Master John de Glasgow;
7. John Glasgw of Stirling;
8. John de Glasgow alias Smith.

That pedigree is not supported by the surviving evidence.

Walter de Glasgu

Master Walter de Glasgu is documented around 1291, not 1210–1240.

He therefore cannot serve as a chronological bridge between John of Huntingdon and John de Glasgu, Bishop Gamelin's chaplain, who was active in 1258/59.

No record identifies Walter's father, son or other relative.

John de Glasgu and Bishop Gamelin

The record calls John:

domino Johanne de Glasgu, capellano domini episcopi

— John de Glasgu, chaplain of the lord bishop.

It does not call him Gamelin's brother.

John's probable appearance with Richard de Stickley at Dunipace helps reconstruct his professional network, not his ancestry.

Adam de Glasgeu

Adam de Glasgeu was a burgess of Berwick-upon-Tweed and granted land called Hiddeslaw in the tenement of Bondington to Melrose Abbey.

The charter is undated and is presently classified as probably fourteenth century. It should not be assigned specifically to c.1280 without further evidence.

The charter names no son or successor.

Alexander, not Andrew

The royal official recorded in 1289/90 was Alexander de Glasgu or Alexander de Glasgow, not Andrew.

Joseph Stevenson's transcription of the damaged receipt reads Alexander de Glasgu. A separate Exchequer account independently reads Alexander de Glasgow.

Bain's later reading Alexander de Glasfrith (?) remains a disputed alternative because the damaged document was uncertain.^[10]

Bain II no. 409, p. 100 gives the receipt's old locator as Chapter House (Scots Documents), Box 94, No. 5. It dates the mutilated, unsealed item to 7 March 1289/90 and cross-references Stevenson I, p. 125.^[11] The current TNA reference and original reading remain unresolved.

No source identifies Alexander as the son of Adam, the Dublin guild entrant of 1238/39, or the ancestor of a later Glasgow family. A 1283 Paisley-register act does identify Alexander, son of the late Richard the messenger of Glasgow, an active local property-holder and therefore a stronger chronological and geographical candidate for the escheator than the Dublin entrant. The companion act separately names Alexander, son of Richard the former constable of Glasgow. Neither identity can be merged with the escheator without another bridge.

Master John de Glasgow

Master John de Glasgow had a substantial ecclesiastical career between 1377 and his death before May 1419.

His documented or probable roles included:

• chancellor of Dunkeld;
• member of Cardinal Walter Wardlaw's household;
• probable canon of Aberdeen;
• canon of Moray;
• legal proctor;
• and holder of Obney or Auchtergaven.

His career demonstrates continued use of de Glasgow among educated clerics and the importance of the Glasgow–Dunkeld institutional corridor.

No document identifies him as a descendant of an earlier de Glasgu bearer or as an ancestor of the fifteenth-century Glasgow or Stirling families.

FamilySearch GWZP-L6B's claim that William de Glasgu (1370–1430) was Master's John's son is not corroboration. The page has no attached historical sources and displays William with a child born in 1360, ten years before William's stated birth. It is a contamination/watch-list item pending recovery of an underlying document.

The “lost century”

The expression “lost century” may be used to describe the absence of a continuous pedigree between the earlier medieval bearers and the fixed surname families of the fifteenth and sixteenth centuries.

It should not be used as evidence that one identified family:

• fled Berwick;
• migrated to Moray;
• moved to Stirling;
• or returned to Glasgow.

The Wars of Independence, border warfare and changes in ecclesiastical patronage created conditions in which such movement was possible. No source currently records that complete route for a Glasgow family.

A restrained interpretation is:

Political disruption, warfare, trade and ecclesiastical patronage may help explain the wide geographical distribution of Glasgow-designated bearers during the fourteenth and fifteenth centuries. The surviving records do not establish a continuous migration route or pedigree.

The fifteenth-century transition

The clearest evidence for surname fixation appears during the fifteenth century.

Glasgow and Stirling bearers

A John de Glasgu was a Glasgow burgess and civic or property witness in 1447 and 1455.

A separate John Glasgw witnessed Stirling acts in 1475 and 1479/80. The unprefixed form Glasgw is consistent with a fixed surname.

The Glasgow and Stirling records may concern:

• the same mobile man;
• close relatives;
• distant relatives;
• or unrelated men using the same surname.

No repeated property, relative, office, seal, burgess transfer or associate currently connects them. They should remain separate working identities.

Alan Glasgw

Alan Glasgow was named as the victim of a killing in a remission produced at the Jedburgh justice ayre on 26 February 1495.^[12]

The former date of 1593 is incorrect.

The record gives no residence, occupation, parentage, widow, children, land or other relatives for Alan. Ralph Ker acted as surety in the proceeding, but this does not establish kinship or patronage.

Alan's record proves that the fixed form Glasgw was present in a Border criminal proceeding by 1495. It does not prove that his family later migrated to Ulster.

John de Glasgow alias Smith

An instrument dated 28 April 1506 records:

Sir Allan Smith and John de Glasgow alias Smith

as joint acquirers of a four-shilling annual rent from a Glasgow High Street tenement. Agnes, daughter and heir of Robert Watson, was the seller, and Sir Allan's property was the northern boundary.^[13]

At catalogue level this proves that John was known by both Glasgow and Smith, and that Robert Watson was Agnes's father. It does not explain the alias or John's relationship to either acquirer.

The document does not state that:

• Smith was his occupation;
• he was a metalworker or armourer;
• Sir Allan Smith was his father;
• he came from Stirling;
• or he descended from the earlier Glasgow burgess.

The former descriptions “hereditary armourer” and “bottleneck breaker” are therefore unsupported.

The proposed sixteenth-century fracture

The current documentary and DNA evidence does not establish a specific division around 1550 between:

• a Glasgow city-merchant branch; and
• a Border or Scots-Irish branch.

The known sixteenth-century Glasgow bearers remain important research subjects, including:

• John Glasgow;
• Stephen Glasgow;
• Robert Glasgow;
• and later civic and merchant families.

Their relationship to the medieval bearers has not been demonstrated through a continuous father-to-son pedigree.

R-FT25406 and R-FT20271

R-FT20271 is downstream of R-FT25406. They are not parallel branches equivalent to separate Colonial and Scots-Irish populations.

The relationship is:

• R-FT25406
  • R-FT20271
    • Several documented Glasgow paternal lines
  • One or more additional downstream lines requiring further resolution

A tester assigned only to R-FT25406 may:

• genuinely belong to another child branch;
• remain unresolved because he has not completed a sufficiently detailed test;
• or eventually test positive for R-FT20271.

Geographical labels such as Colonial, Scottish or Scots-Irish should be applied only after:

1. the relevant child branches have been genetically resolved;
2. multiple independently documented paternal pedigrees have been assigned to each branch;
3. and the shared ancestor's likely date and location have been reconstructed.

The Ulster hypothesis

Border families participated in seventeenth-century migration to Ulster. A Glasgow paternal line may therefore have moved from Scotland to Ulster.

Alan Glasgw's 1495 killing does not demonstrate that migration. More than a century separates the killing from the principal Plantation period, and no intervening generations have been identified.

The proposed connection remains:

1. Alan Glasgw, killed before February 1495;
2. unidentified possible descendants;
3. hypothetical migration to Ulster after 1600;
4. later Scots-Irish Glasgow paternal lines.

Each step after Alan is currently unsupported.

The theory should be tested through:

• Scottish testaments;
• sasines and land records;
• Border court material;
• muster rolls;
• Plantation grants;
• Ulster parish records;
• and documented pedigrees of R-FT20271 testers.

Current reconstruction

The evidence presently supports the following:

1. A paternal ancestor represented by R-FT4811 lived during the central Middle Ages.
2. His descendants separated into branches now represented among some Glasgow, Churnside, Brown and related paternal lines.
3. The principal tested Glasgow cluster descends through R-FT32941 and R-FT25406.
4. The personal locative de Glasgu was in use by the late twelfth century.
5. It was used by merchants, clerics, lay witnesses, burgesses, royal officials and other individuals.
6. At least two records contain explicit father-son constructions involving a Glasgow-designated father.
7. Neither construction proves that the son inherited Glasgow as a surname.
8. No continuous pedigree currently connects the separate medieval bearers.
9. Fixed, unprefixed surname forms are clearly present by the later fifteenth century.
10. No named medieval bearer has yet been identified as the carrier of R-FT32941, R-FT25406 or R-FT20271.

Working hypothesis

The Duffield–Glasgow model remains one possible explanation among several:

A paternal lineage with English or wider north-west European origins may have entered Scotland during the Anglo-Norman period. One or more descendants became associated with Glasgow through trade, residence, episcopal service or royal administration and adopted the place-derived byname de Glasgu. Some descendants may later have transmitted Glasgow as a hereditary surname.

The evidence does not presently justify the stronger claim that:

A knight from Ferrières-Saint-Hilaire founded R-FT4811, his descendant settled at Duffield Castle, John de Duffeld became John of Huntingdon, and John's direct male descendants founded the medieval Glasgow family.

That sequence should be labelled a speculative research hypothesis, not a proven pedigree.

Alternative explanations

The surviving evidence is also compatible with:

1. Independent locatives: several unrelated men acquired de Glasgu because they originated in Glasgow.
2. An urban merchant family: one Glasgow family developed branches in Dublin, Scotland and northern England.
3. A mixed model: some bearers were related while others independently adopted the same locative.
4. Ecclesiastical recruitment: clerics from Glasgow repeatedly entered the Dunkeld, Durham, St Andrews and Moray networks without belonging to one family.
5. Later surname convergence: more than one medieval Glasgow-origin family eventually transmitted the same fixed surname.

The mixed model currently requires the fewest unsupported assumptions.

Evidence required to confirm the Duffield connection

The hypothesis would be materially strengthened by:

1. A high-resolution Y-DNA result from an independently documented Duffield paternal line at R-FT32941 or a closely related branch.
2. Additional Big Y tests resolving the child branches beneath R-FT25406.
3. Multiple independently documented Glasgow pedigrees assigned to each branch.
4. A medieval document connecting John of Huntingdon with the Duffield surname.
5. An explicit relationship between John of Huntingdon and a de Glasgu bearer.
6. Property or office succession connecting separate medieval bearers.
7. Shared seals, heraldry or recurring rare associates linking Duffield and Glasgow families.
8. Documentary evidence connecting a fifteenth- or sixteenth-century Scottish Glasgow family to an Ulster line.

Conclusion

The Y-DNA evidence supports a genuine medieval paternal relationship between some modern Glasgow, Churnside, Brown and related lines.

The historical explanation remains unresolved.

The proposed Duffield and Norman background is plausible as general context, but no source currently connects the relevant Y-DNA branch specifically to:

• Duffield Castle;
• the de Ferrers family;
• Ferrières-Saint-Hilaire;
• the Battle of Hastings;
• Roger de Duffeld;
• or John of Huntingdon.

The medieval documentary evidence instead shows a durable Glasgow-derived locative used from the late twelfth century within overlapping merchant, civic, royal and ecclesiastical networks. It became clearly surname-like during the fifteenth century.

A single hereditary family may account for some of the bearers, but more than one independent Glasgow-origin family may be represented. Until a documentary male-line bridge is found, the genetic tree and the medieval bearer register should be presented alongside one another rather than merged into a named pedigree.

Sources

Related research:

• Bearers of the de Glasgu Name and the Emergence of the Glasgow Surname, c.1175–1500
• John, Official of Glasgow
• Roger de Duffeld
• Glasgow Ancient Y-DNA
• Glasgow DNA
• R-FT32941
• R-FT25406

Project data:

• FamilyTreeDNA Glasgow Project
• FamilyTreeDNA Discover: R-FT4811
• FamilyTreeDNA Discover: R-FT32941
• FamilyTreeDNA Discover: R-FT25406
• FamilyTreeDNA Discover: R-FT20271