JT
John Thomson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marin-County, California
Our Model Tree links this John Thomson across the 1930 and 1940 US Censuses in Marin-County, California (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 5-person household.
Age 47
b. ~1893
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marin-County, California |
| Surname | Thomson |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Sausalito |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | wharfmaster |
| Industry | Steamship Co. |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1800 |
| Highest Grade | Hs 2 |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Wharfmaster |
| Township / Ward | Sausalito |
| Est. Birth Year | ~1893 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Thomson | Head | — | 47 | ~1893 |
| Catherine Thomson | Spouse | — | 47 | ~1893 |
| John Thomson | Son | — | 15 | ~1925 |
| Kenneth Thomson | Son | — | 21 | ~1919 |
| Walter Thomson | Son | — | 18 | ~1922 |
Census Appearances
1930
Alameda, California
Head, age 37
Alameda, California · implied b. ~1893 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomson |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1905 |
| Age at First Marriage | 22 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Mechanic |
| Industry | Diesel Engine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 4000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Marin-County, California
Head, age 47
Marin-County, California · implied b. ~1893 — 5 household members
| Surname | Thomson |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Sausalito |
| Naturalization Status | Naturalized |
| Occupation | wharfmaster |
| Industry | Steamship Co. |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1800 |
| Highest Grade | Hs 2 |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links John Thomson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Thomson
Head · 1940 · age 47 · b. ~1893 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Marin-County, California
Open full size
1940 US Federal Census — Marin-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00262-00455)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles Bannan | 70 | Head | Leather Worker | New York |
| 2 | Charles J. Capelin | 69 | Head | Harness Maker | Sweden |
| 3 | John E. Thomson THIS PERSON | 47 | Head | Wharfmaster | Scotland |
| 4 | Catherine Thomson | 47 | Wife | — | Scotland |
| 5 | Kenneth M. Thomson | 21 | Son | Accountant | California |
| 6 | Walter C. Thomson | 18 | Son | — | California |
| 7 | John E. Jr. Thomson | 15 | Son | — | California |
| 8 | Charles E. Finch | 29 | Head | Route Salesman | Ohio |
| 9 | Beverly E. Finch | 31 | Wife | — | Washington |
| 10 | Patricia Finch | 11 | Daughter | — | Oregon |
| 11 | Charles E. Finch | 2 | Son | — | California |
| 12 | Adelina M. Cook | 35 | Sister | Secretary | Ohio |
| 13 | John O. Davidson | 46 | Head | Secretary | Scotland |
| 14 | Marion C. Davidson | 43 | Wife | Dress Model | Ohio |
| 15 | John O. Jr. Davidson | 3 | Son | — | New York |
| 16 | Alice Lee | 64 | Mother-in-law | — | Ohio |
| 17 | John Mcauley | 43 | Head | Stationery Inspector | California |
| 18 | Anna E. Mcauley | 40 | Wife | Saleslady | California |
| 19 | John L. Mcauley | 20 | Son | Press Boy & Printer | California |
| 20 | Richard P. Mccarty | 40 | Head | Courier | Iowa |
| 21 | Rebecca Mccarty | 39 | Wife | — | California |
| 22 | Anton C. Matson | 41 | Head | Ferry Boat Officer | Denmark |
| 23 | Wally C. Matson | 41 | Wife | — | Germany |
| 24 | Walter J. Matson | 15 | Son | — | California |
| 25 | Edward L. Matson | 14 | Son | — | California |
| 26 | Agnes C. Doyle | 51 | Head | Sales Newspaper | California |
| 27 | Claire Vranaugh | 50 | Sister | Stenographer | California |
| 28 | Raymond K. Hansen | 46 | Head | Proprietor & Salesman | California |
| 29 | Gertrude Hansen | 37 | Wife | — | California |
| 30 | Ronald G. Hansen | 2 | Son | — | California |
| 31 | David Schary | 16 | Step-son | — | California |
| 32 | Sadie S. Bucklin | 53 | Head | Chief Clerk | Minnesota |
| 33 | Hermit N. Smith | 29 | Head | Clerk Using Tabulating Machine | Iowa |
| 34 | Iris R. Smith | 27 | Sister | Statistician | Iowa |
| 35 | Hattie N. Smith | 50 | Mother | — | Iowa |
| 36 | Henry Elvers | 69 | Head | — | Germany |
| 37 | Minnie J. Elvers | 65 | Wife | — | California |
| 38 | Ellery H. Saville | 25 | Head | Grocery Clerk | Canada English |
| 39 | Josephine M. Saville | 59 | Mother | — | Canada French |
| 40 | William M. English | 57 | Head | Caretaker | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)