AT
Ada Thomas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Ada Thomas across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 7-person household.
Age 47
b. ~1893
Female
Head
Born: Pennsylvania
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Thomas |
| Given Name | Ada |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Widowed |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | INDIANA TOWNSHIP |
| 1935 Residence (County) | ALLEGHENY |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Indiana Township |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ada | Age | Birth yr |
|---|---|---|---|---|
| Melvin Thomas | Son | — | 5 | ~1935 |
| Charles Thomas | Son | — | 24 | ~1916 |
| Ada Thomas | Head | — | 47 | ~1893 |
| Harold Thomas | Son | — | 7 | ~1933 |
| Hazel Thomas | Daughter | — | 10 | ~1930 |
| Earl Thomas | Son | — | 23 | ~1917 |
| James Hougy | Other | — | 23 | ~1917 |
Census Appearances
1920
Allegheny, Pennsylvania
Spouse, age 27
Allegheny, Pennsylvania · implied b. ~1893 — 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 | 27 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Spouse, age 38
Allegheny, Pennsylvania · implied b. ~1892 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ada |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 18 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Clerk |
| Industry | Auto Parts Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 47
Allegheny-County, Pennsylvania · implied b. ~1893 — 7 household members
| Surname | Thomas |
| Given Name | Ada |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Widowed |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | INDIANA TOWNSHIP |
| 1935 Residence (County) | ALLEGHENY |
| Class of Worker | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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
Head · 1940 · age 47 · b. ~1893 · Pennsylvania
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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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03406-00589)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ida Schmidt | 27 | Wife | Manager | Pennsylvania |
| 42 | Robert Jr Schmidt | 5 | Son | — | — |
| 43 | Frank Mcadam | 41 | Head | Miner | Pennsylvania |
| 44 | Aida Mcadam | 38 | Wife | — | Pennsylvania |
| 45 | Laura Mcadam | 17 | Daughter | Clerk | Pennsylvania |
| 46 | Elmer Mcadam | 16 | Son | — | Pennsylvania |
| 47 | Sarah M Mcadam | 11 | Daughter | — | Pennsylvania |
| 48 | Doris Mcadam | 3 | Daughter | — | — |
| 49 | Marie Black | 77 | Mother-in-law | — | Pennsylvania |
| 50 | William Mcclelland | 52 | Head | Farmer | Pennsylvania |
| 51 | Vincent Mcclelland | 49 | Brother | Farmer | Pennsylvania |
| 52 | Bella Miller | 68 | Head | — | Pennsylvania |
| 53 | Harry Miller | 40 | Son | Janitor | Pennsylvania |
| 54 | Holger Anderson | 43 | Head | Bricklayer | Pennsylvania |
| 55 | Madeline Anderson | 33 | Wife | Nurse | Pennsylvania |
| 56 | Ada Thomas THIS PERSON | 47 | Head | — | Pennsylvania |
| 57 | Charles Thomas | 24 | Son | Truck Driver | Pennsylvania |
| 58 | Earl Thomas | 23 | Son | Laborer | Pennsylvania |
| 59 | Hazel Thomas | 10 | Daughter | — | Pennsylvania |
| 60 | Harold Thomas | 7 | Son | — | Pennsylvania |
| 61 | Melvin Thomas | 5 | Son | — | — |
| 62 | James Hougy | 23 | Roomer | Chauffeur | Pennsylvania |
| 63 | Raymond Miller | 33 | Head | Truck Driver | Pennsylvania |
| 64 | Leona Miller | 32 | Wife | — | Pennsylvania |
| 65 | Jean Miller | 8 | Daughter | — | Pennsylvania |
| 66 | Dorothy Miller | 6 | Daughter | — | — |
| 67 | Mildred Merwin | 51 | Head | Matron | Connecticut |
| 68 | Fred Merwin | 59 | Husband | Farmer | Connecticut |
| 69 | Mary Bauer | 91 | Guest | — | Germany |
| 70 | Pauline Bauer | 87 | Guest | — | Germany |
| 71 | Mary Whaleman | 86 | Guest | — | Pennsylvania |
| 72 | Joan Spickert | 69 | Guest | — | Pennsylvania |
| 73 | Anna Bell | 91 | Guest | — | Pennsylvania |
| 74 | Agnes Kreiling | 65 | Guest | — | Pennsylvania |
| 75 | Henry Harms | 67 | Guest | — | Germany |
| 76 | John Fugger | 69 | Guest | — | Pennsylvania |
| 77 | Sarah Strohm | 55 | Guest | — | Ohio |
| 78 | Margaret Hildebrand | 71 | Guest | — | Pennsylvania |
| 79 | Minnie Scheidemann | 82 | Guest | — | Germany |
| 80 | Bernard Broglie | 86 | Guest | — | France |
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)