TJ
Thomas Johnston — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Thomas Johnston across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed) — first a head (b.~1877), then head of a 4-person household.
Age 63
b. ~1877
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Johnston |
| Given Name | Thomas J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1877 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Thomas Johnston | Head | — | 63 | ~1877 |
| Ralph Low | Other | — | 23 | ~1917 |
| Lavell Johnston | Son | — | 24 | ~1916 |
| Ruth Johnston | Spouse | — | 54 | ~1886 |
Census Appearances
1920
San Francisco, …
Head, age 43
San Francisco, California · implied b. ~1877
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Johnston |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1895 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Engineer |
| Industry | Laundry |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth Country | Scotland |
| Year of Naturalization | 1904 |
| Birthplace (normalized) | scotland |
1930
San Francisco, …
Head, age 53
San Francisco, California · implied b. ~1877 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Thomas J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1895 |
| Age at First Marriage | 43 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Stationary Eng |
| Industry | Lithograph Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 6000 |
| Radio Set | R |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
San-Francisco-County, California
Head, age 63
San-Francisco-County, California · implied b. ~1877 — 4 household members
| Surname | Johnston |
| Given Name | Thomas J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Naturalization Status | Naturalized |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| 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 Thomas Johnston across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Thomas Johnston
Head · 1940 · age 63 · b. ~1877 · California
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — San-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00315-00143)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Julia Mantoni | 74 | Patient | — | California |
| 2 | Lila Sheets | 84 | Patient | — | California |
| 3 | Edward F Nelson | 39 | Head | Conductor | California |
| 4 | Florence O Nelson | 35 | Wife | — | California |
| 5 | Edward Nelson | 8 | Son | — | California |
| 6 | Mary M Hemming | 76 | Mother | — | California |
| 7 | Joaquin J Bairros | 74 | Head | — | Portugal |
| 8 | Jeanne B Bairros | 63 | Wife | — | France |
| 9 | Alvin Spencer | 35 | Head | Laborer | Texas |
| 10 | Ann D Spencer | 27 | Wife | — | New Mexico |
| 11 | Vivian De Lay | 28 | Head | Salesman | Oklahoma |
| 12 | Beatrice De Lay | 30 | Wife | — | Texas |
| 13 | Billie Ed De Lay | 9 | Son | — | Texas |
| 14 | Vivian De Lay | 2 | Daughter | — | California |
| 15 | Frederick Heller | 39 | Head | Fireman | California |
| 16 | Harry Heller | 43 | Brother | Elevator App | California |
| 17 | Sophie A Heller | 35 | Sister | — | California |
| 18 | Sophia Heller | 84 | Mother | — | Germany |
| 19 | Ruth A Palmer | 38 | Head | — | Missouri |
| 20 | James W Palmer | 9 | Son | — | Washington |
| 21 | Nancy J Palmer | 8 | Daughter | — | California |
| 22 | Lillie Holst | 64 | Mother | — | Indiana |
| 23 | Thomas J Johnston THIS PERSON | 63 | Head | — | Scotland |
| 24 | Ruth L Johnston | 54 | Wife | — | New York |
| 25 | Lavell W Johnston | 24 | Son | Plant Worker | California |
| 26 | Ralph Low | 23 | Lodger | Salesman | Utah |
| 27 | Betsy A Pate | 6 | Head | — | Rhode Island |
| 28 | John Pate | 25 | Son | Engineer | New York |
| 29 | Charles A Meisel | 50 | Head | — | Russia |
| 30 | Barbara Meisel | 40 | Wife | — | Russia |
| 31 | George Huckabay | 39 | Head | Laborer | California |
| 32 | Janet R Huckabay | 33 | Wife | — | Scotland |
| 33 | Robert Huckabay | 1 | Son | — | California |
| 34 | Benjamin S Jacobs | 61 | Head | — | Poland |
| 35 | Lulu Marie Jacobs | 55 | Wife | — | Missouri |
| 36 | Brooklyn B Wharton | 67 | Head | Salesman | Ohio |
| 37 | Sierra Nevada Wharton | 72 | Wife | — | California |
| 38 | Lois L Abernathy | 53 | Head | — | Michigan |
| 39 | Kenneth Stotelmejer | 23 | Head | Apprentice Printer | Iowa |
| 40 | Patricia Stotelmejer | 20 | Wife | — | Nevada |
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)