AT
Ada Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Diego-County, California
Our Model Tree links this Ada Thomas across the 1920, 1930 and 1940 US Censuses in San-Diego-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1881), then head of a 3-person household.
Age 59
b. ~1881
Female
Spouse
Born: England
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Diego-County, California |
| Surname | Thomas |
| Given Name | Ada |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Coronado city |
| 1935 Residence (County) | San Diego |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | none |
| Class of Worker | H |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
| Township / Ward | Coronado City |
| Est. Birth Year | ~1881 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ada | Age | Birth yr |
|---|---|---|---|---|
| Margaret Thomas | Daughter | — | 20 | ~1920 |
| Edward Thomas | Head | — | 60 | ~1880 |
| Ada Thomas | Spouse | — | 59 | ~1881 |
Census Appearances
1920
San Diego, …
Spouse, age 39
San Diego, California · implied b. ~1881 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ada |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | England |
| Year of Immigration | 1910 |
| Naturalization Status | Alien |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1930
San Diego, …
Spouse, age 49
San Diego, California · implied b. ~1881 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ada |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | England |
| Naturalization Status | First papers filed |
| Year of Immigration | 1909 |
| Age at First Marriage | 44 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Truck driver |
| Industry | Salt works |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
San-Diego-County, California
Spouse, age 59
San-Diego-County, California · implied b. ~1881 — 3 household members
| Surname | Thomas |
| Given Name | Ada |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | England |
| 1935 Residence (City) | Coronado city |
| 1935 Residence (County) | San Diego |
| Naturalization Status | Naturalized |
| Occupation | none |
| Class of Worker | H |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Ada Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Ada Thomas
Spouse · 1940 · age 59 · b. ~1881 · 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-Diego-County, California
Open full size
1940 US Federal Census — San-Diego-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00296-00391)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marvin Abrams | 27 | Head | Meat Cutter | Kansas |
| 2 | Peggy A. Abrams | 21 | Wife | None | Texas |
| 3 | Edward H. Thomas | 60 | Head | Gardener | England |
| 4 | Ada Thomas THIS PERSON | 59 | Wife | None | England |
| 5 | Margaret Thomas | 20 | Daughter | Filing Clerk | California |
| 6 | Samuel H. Wilson | 36 | Head | Deck Hand | Mississippi |
| 7 | Lucille D. Wilson | 28 | Wife | Nurse | Mississippi |
| 8 | Martha Burkett | 45 | Head | Saleswoman | Washington D.C. |
| 9 | Alice D. Reynolds | 81 | Aunt | None | Maryland |
| 10 | Roy Lees | 37 | Head | Janitor | Iowa |
| 11 | Alma B. Lees | 42 | Wife | None | Illinois |
| 12 | Sydney Cofman | 24 | Step-son | Janitor | California |
| 13 | Mary Joy Lees | 16 | Daughter | None | California |
| 14 | John R. Mccants | 40 | Head | Aviation Machinist | Minnesota |
| 15 | Marie Mccants | 30 | Wife | None | New York |
| 16 | William Mccants | 13 | Son | None | Florida |
| 17 | John Mccants | 10 | Son | None | California |
| 18 | Frank D. Burke | 58 | Head | None | Wisconsin |
| 19 | Frank H. Browning | 25 | Head | Ensign | Louisiana |
| 20 | Carolyn A. Browning | 27 | Wife | None | Pennsylvania |
| 21 | Barbara Jefferies | 69 | Head | None | Germany |
| 22 | Kurt Storch | 39 | Head | Manager | Germany |
| 23 | Marie Storch | 34 | Wife | None | Ohio |
| 24 | Kurt G. Storch | 8 | Son | None | Ohio |
| 25 | John Jesse | 29 | Head | Aviation Machinist | Illinois |
| 26 | Gertrude Jesse | 27 | Wife | None | Indiana |
| 27 | Harry A. Miller | 53 | Head | Lieutenant Commander | Indiana |
| 28 | Ruth E. Miller | 43 | Wife | None | Vermont |
| 29 | Jane H. Miller | 19 | Daughter | None | Pennsylvania |
| 30 | Harry A. Jr. Miller | 13 | Son | None | Massachusetts |
| 31 | William B. Sapton | 79 | Head | None | New York |
| 32 | Molly C. Sapton | 70 | Wife | None | California |
| 33 | Katherine Sapton | 38 | Daughter | None | California |
| 34 | Raymond S. Sapton | 18 | Grand-son | None | California |
| 35 | Dale Small | 45 | Head | Commander | Iowa |
| 36 | Gladys D. Small | 46 | Wife | None | Nebraska |
| 37 | John T. Small | 19 | Son | None | Connecticut |
| 38 | Walter H. Lessing | 59 | Head | Captain | Kentucky |
| 39 | Katherine A. Lessing | 51 | Wife | None | Arkansas |
| 40 | Catherine D. Lessing | 20 | Daughter | None | Washington D.C. |
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)