These research notes are provided as-is and contain supplementary working research.

Identity — candidate overview

Every documented same-name English John Gurney household the record sweeps have surfaced is tested against one shared matching-criteria profile, drawn from the colonial baseline and set out below; each household that fails it is eliminated or reduced to a residual. Of the 51 named households, 45 are eliminated outright and five more are held to a residual 1–3% likelihood; only Candidate B — the working hypothesis that John was the son of Francis Gurney of Norfolk and London — survives the test.[1] Candidate B’s own probability assessment, including its unknown-corridor residuals, is the argument-specific synthesis of the John Gurney identity case file §11; it stays there rather than being re-derived in this graph.[2] This unit carries the shared test and its outcome, not the surviving candidate’s own case.

The matching-criteria profile

Any English candidate for the Braintree emigrant must plausibly account for a tailor named John Gurney — a trade already anchored in the colonial record[3] — married to a wife named Mary who bore children Sarah, Mary, Richard, John, and Peter,[4] born in England within a c.1602–1610 window read off his own 1652/3 “aged 50 or thereabouts” deposition,[5] and gone from the English record by the time he first appears in Massachusetts in June 1641.[6] A settled Puritan household is a soft fifth criterion, consistent with — though not distinctive of — most Great Migration emigrants of the period.[7] It is this whole profile, not a bare name match, that every candidate is tested against. Evidence

How candidates are tested and eliminated

Against that profile, a household is eliminated on structural rather than circumstantial grounds: continuing documented English residence past June 1641, most visibly Candidate A’s Saint Mary, Aylesbury baptisms running to 1653 across a continuous chain from a 1603 Stewkley baptism, and repeated again and again across the same-name clearance sweep (Chesham, East Claydon, Denton, and dozens more);[8] a wife whose name is not Mary — the ground that clears the majority of the sweep (Alice Oliffe, Elizabeth, Anne, Rose, Jane, and others);[8] a child set that does not match, or that collides in date, as in Candidate C’s eight-child Berkhamsted family, whose 1624 John Jr. and 1634 Sarah do not line up with the colonial John Jr.'s c.1633 or Sarah’s c.1628, and which has no Mary or Peter at all;[9] or a documented trade, death, or generation that places the household in the wrong period, as in Candidate D’s 1662 London hearth-tax entry — dated the same calendar year the colonial John was dying at Boston.[10] A household attested by only a single indexed event, with no continuing record behind it, is held at a low residual (1–3%) rather than eliminated outright, since one record cannot itself rule out an unrecorded emigration.[11] This is the same family-status-and-chronology standard already applied once inside this graph, where it separates the Braintree emigrant himself from a same-named man he is not: the 1636 Newgate apprentice, cleared on the identical combination of a mismatched family status and a chronology that will not bend to fit.[12] Evidence

The candidate landscape

Candidate Standing Elimination ground
A — Aylesbury / Bierton / Northamptonshire Eliminated Continuous English residence 1603–1653; wife Alice Oliffe
B — son of Francis Gurney & Margaret Rybett Probable (~65%; case file §11) Sole survivor of the shared test
C — Berkhamsted, Hertfordshire Eliminated Eight-child family 1610–1636; wrong age; no Mary or Peter
D — London draper, Old Change Eliminated Continuing London residence through 1662
Five other named households Unlikely, ~8% combined Single-attestation only, capped by chronology or a naming collision
Same-name clearance sweep (45 further households) Eliminated Died in England, wrong wife, wrong trade, or wrong generation

The 45 further households of the clearance sweep are not restated one by one here. Their household-by-household enumeration, each with its single strongest elimination ground, is published as the case file’s §8.6 table, which this unit cross-references as the master list.[13] Full working detail for each principal candidate sits in its own topic: the Aylesbury/Buckinghamshire, Ackworth, London-draper, and other-eliminations units, with Berkhamsted (Candidate C) carried in the assessment unit.[14] Candidate B’s own trade/corridor/motive/network argument and its East Dereham baptism reading are in the Candidate B unit, and what the whole elimination amounts to is the assessment unit. This unit tests and clears the field; it does not argue the surviving candidate’s case.[15] Evidence



  1. The 51-household field is the product of the record sweeps, not of any single work. Findmypast supplementary same-name sweep, May 2026, across twelve surname variants and eighteen English parish, burial, probate, and licence collections (Source ID: findmypast-john-gurney-2026may-supplementary-same-name-sweep); The National Archives, Kew, Prerogative Court of Canterbury Gurney probate corpus, 1577–1682 — thirteen items, seven of them fixing distinct John Gurneys in England after 1637 (Source ID: tna-pcc-gurney-elimination-corpus); FamilySearch, “England, Births and Christenings, 1538–1975” (Source ID: fs-england-births-christenings); Findmypast Buckinghamshire Baptism, Burial, and Marriage indexes, Centre for Buckinghamshire Studies (Source IDs: findmypast-bucks-baptism-index, findmypast-bucks-burial-index, findmypast-bucks-marriage-index); Findmypast UK Parish Baptisms (Source ID: findmypast-uk-parish-baptisms). Each named household’s own evidence is carried in the candidate unit that holds it. ↩︎ ↩︎

  2. Cross-reference, not a source. John Gurney identity case file, §11, “Probability Assessment”: Candidate B ~65% as of case file v4.3 (raised from ~60% in v4.2), with residual estimates for the eliminated and unlikely candidates and two unknown-corridor scenarios summing to 100%. The probability model is the case file’s own argument-specific synthesis; it is neither evidence for anything asserted here nor re-derived in this unit. ↩︎ ↩︎

  3. Colonial Braintree community, G13-RI-000047 (“a tailor by trade, a husbandman by economy”), cited here cross-unit. ↩︎

  4. Family — wives and marriages, G13-RI-000063 (first wife Mary); Family — the children as a family group, G13-RI-000065 (the five-child roster), both cited here cross-unit. ↩︎

  5. Origin — age and baptism, G13-RI-000069 (the 1652/3 deposition) and G13-RI-000070 (born c.1602–1610), cited here cross-unit. ↩︎

  6. Colonial arrival chronology, G13-RI-000006 (arrival window 1638–early 1641), cited here cross-unit. ↩︎

  7. David Hackett Fischer, Albion’s Seed: Four British Folkways in America (New York: Oxford University Press, 1989), pp. 13–205, the Puritan migration context for Massachusetts Bay. Source ID: fischer-albions-seed-1989. Robert Charles Anderson, The Great Migration Directory: Immigrants to New England, 1620–1640: A Concise Compendium, 2nd ed. (Boston: NEHGS, 2025), p. 158, placing John Gurney in the Great Migration-era Boston/Braintree settlements. Validation note: sources/validations/anderson-gmd-2015.md. Source ID: anderson-gmd-2015. ↩︎

  8. Candidate A’s continuing-residence chain: FamilySearch, “England, Births and Christenings, 1538–1975” — Jhon Gurney christened 21 February 1603 at Stewkley, and the Saint Mary, Aylesbury family group of five children baptized 1638–1653 (Source ID: fs-england-births-christenings); Findmypast Buckinghamshire Marriage Index — John Gurney and Alice Oliffe, 24 April 1628, Bierton with Broughton, Bucks Archives PR16/1/1Q p. 30 (Source ID: findmypast-bucks-marriage-index); The National Archives, Kew, E 115/180/113, certificate of residence recording his 1641 move from the Aylesbury half-hundred into Northamptonshire (Source ID: tna-e115-180-113-certificate-of-residence-1641; not examined at image level — see the validation note). The wife-name and continuing-residence grounds across the wider sweep rest on the Findmypast Buckinghamshire Baptism, Burial, and Marriage indexes (Source IDs: findmypast-bucks-baptism-index, findmypast-bucks-burial-index, findmypast-bucks-marriage-index), Findmypast UK Parish Baptisms (Source ID: findmypast-uk-parish-baptisms), the May 2026 supplementary same-name sweep (Source ID: findmypast-john-gurney-2026may-supplementary-same-name-sweep), and the Prerogative Court of Canterbury probate corpus (Source ID: tna-pcc-gurney-elimination-corpus). Worked through in Candidate A, G13-RI-000107 and G13-RI-000108, and Other eliminations, G13-RI-000117 and G13-RI-000119; both cited here cross-unit. ↩︎ ↩︎

  9. Hertfordshire Baptisms, parish-register baptism index, Hertfordshire Archives and Local Studies, served via Findmypast — the eight Berkhamsted baptisms of 1610–1636 to a father John Gurney (Source ID: findmypast-hertfordshire-baptisms). Hertfordshire Burials, same repository and provider — no John Gurney burial at Berkhamsted 1640–1700 (Source ID: findmypast-hertfordshire-burials). Carried in-graph as G13-RI-000171 and G13-RI-000172 in Identity — assessment, cited here cross-unit. ↩︎

  10. Mark Merry, London Hearth Tax project database (Centre for Metropolitan History, 2010), published at British History Online — John Gurney, “In St Austins precinct,” Farringdon Within Ward, 1 hearth, assessed “poore,” 1662; underlying manuscript The National Archives, E 179/252/27, rot. 21 (Source ID: bho-london-hearth-tax-merry-2010). T. C. Dale, “Inhabitants of London in 1638: St. Augustine,” in The Inhabitants of London in 1638 (Society of Genealogists, 1931), British History Online — the same John Gurney assessed at £10 rent (Source ID: bho-london-inhabitants-st-augustine-1638). Carried as G13-RI-000122 and G13-RI-000123 in Candidate D, cited here cross-unit. ↩︎

  11. The single-attestation households and the negative continuation searches behind them. FamilySearch, “England, Marriages, 1538–1973” — John Gurney × Anne Cowheard, Aylesbury, 25 October 1638 (FS ID N2TD-Z9Z), and John Gurney × Avis Garter, Amersham, 7 February 1638 (Source ID: fs-england-marriages-1538-1973). FamilySearch, “England, Norfolk, Parish Registers (County Record Office), 1510–1997” — John Gurny × Jane Wright, Saint Benedict, Norwich, 9 March 1639 (Source ID: fs-england-norfolk-parish-registers-1510-1997). Hitcham, Buckinghamshire: Mary Gurny baptized 22 January 1631, father John Gurny, mother unindexed, with no further Hitcham Gurney activity 1620–1665 across the Findmypast Buckinghamshire indexes (Source IDs: findmypast-bucks-baptism-index, findmypast-bucks-burial-index, findmypast-bucks-marriage-index). Ackworth, Yorkshire: Findmypast England Marriages 1538–1973 transcript R_855220028 and England Births & Baptisms 1538–1975 transcript R_948023155 (Source IDs: findmypast-ackworth-gurnoe-burton-marriage-1636, findmypast-ackworth-gurnoe-baptism-1637-john-thomas), carried as G13-RI-000111 in Ackworth, cited here cross-unit. The residual percentages attached to these households are the case file’s probability model, not a finding of this unit — see [2]. ↩︎

  12. Origin — trade and training, G13-RI-000075; Origin — traditions, G13-RI-000100. Both cited here cross-unit. ↩︎

  13. Cross-reference, not a source. John Gurney identity case file, §8.6, “Same-name clearance sweep,” and the §8.3 Buckinghamshire same-county cluster: the household-by-household table of every remaining same-name English John Gurney, each with its single strongest elimination ground. The evidence under those rows is the record sweeps cited at [1]; the case file is the published enumeration of them, deliberately not replicated household by household in this graph. ↩︎

  14. Assimilated (2026-07-07): Candidate A — Aylesbury, Buckinghamshire (topicId g13-identity-candidate-a, from research/topics/john-gurney-candidate-aylesbury-buckinghamshire.md); Ackworth, Yorkshire (topicId g13-identity-candidate-ackworth, from …-ackworth-yorkshire.md); and Other Eliminations and Earsham (topicId g13-identity-other-eliminations, absorbing …-earsham-norfolk.md and the same-name clearance-sweep portion of …-others.md; the others file’s Costessey/Cawston/Providence/Isaac-Gurney/Francis-of-Maldon material stays on its own dedicated subject files, out of scope for this graph). Assimilated (2026-07-07): Candidate D — London draper, Old Change (topicId g13-identity-london-candidate, from …-london-draper.md). Assimilated (2026-07-10): …-berkhamsted-hertfordshire.md — Candidate C was never given a unit of its own, and its three-ground elimination is carried in Identity — assessment, G13-RI-000171 and G13-RI-000172. ↩︎

  15. Cross-reference, not a source. The parentage argument itself is the staged Identity — Candidate B: Norfolk parentage (topicId g13-identity-candidate-b), which carries it as G13-RI-000145 and its weighing as G13-RI-000170, both cited here cross-unit; the case file’s own presentation of the same argument is at §2, §5, §9, and §10. ↩︎