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Thomas Leonard — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Thomas Leonard across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1890), then head of a 5-person household.
Age 50
b. ~1890
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Leonard |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Herminie |
| 1935 Residence (County) | Westmoreland |
| Additional Details | |
| Occupation | Miner |
| Industry | Coal Mine |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1580 |
| Highest Grade | No 8 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Miner |
| Township / Ward | Indianola |
| Est. Birth Year | ~1890 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Thomas Leonard | Son | — | 21 | ~1919 |
| Elizabeth Leonard | Daughter | — | 25 | ~1915 |
| Thomas Leonard | Head | — | 50 | ~1890 |
| Francis Leonard | Son | — | 27 | ~1913 |
| Rose Leonard | Daughter | — | 17 | ~1923 |
Census Appearances
1920
Allegheny, Pennsylvania
Other, age 30
Allegheny, Pennsylvania · implied b. ~1890 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Thomas |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Machinist |
| Industry | Railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Other, age 40
Allegheny, Pennsylvania · implied b. ~1890 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Thomas E. |
| Relationship to Head | Brother |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Age at First Marriage | 28 |
| Father's Birthplace | England |
| Mother's Birthplace | Pennsylvania |
| Occupation | Clerk-Purchasing Dept |
| Industry | Steel Cars |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 50
Allegheny-County, Pennsylvania · implied b. ~1890 — 5 household members
| Surname | Leonard |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Herminie |
| 1935 Residence (County) | Westmoreland |
| Occupation | Miner |
| Industry | Coal Mine |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 1580 |
| Highest Grade | No 8 |
| 1935 Residence | Pennsylvania |
| 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 Thomas Leonard across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thomas Leonard
Head · 1940 · age 50 · b. ~1890 · Pennsylvania
★ 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 — 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-t0627-03406-00581)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas Leonard THIS PERSON | 50 | Head | Miner | Pennsylvania |
| 42 | Francis Leonard | 27 | Son | Miner | Pennsylvania |
| 43 | Elizabeth Leonard | 25 | Daughter | — | Pennsylvania |
| 44 | Thomas Jr Leonard | 21 | Son | New Worker | Pennsylvania |
| 45 | Rose Leonard | 17 | Daughter | — | Pennsylvania |
| 46 | Peter Marutiak | 54 | Head | Miner | Austria |
| 47 | Barbara Marutiak | 54 | Wife | — | Austria |
| 48 | Steve Marutiak | 24 | Son | Laborer | Pennsylvania |
| 49 | Sophia Marutiak | 20 | Daughter | — | Pennsylvania |
| 50 | John Marutiak | 17 | Son | — | Pennsylvania |
| 51 | Mary Marutiak | 13 | Daughter | — | Pennsylvania |
| 52 | Andrew Mehalov | 35 | Head | Laborer | Pennsylvania |
| 53 | Mary Mehalov | 31 | Wife | — | Pennsylvania |
| 54 | Mary A Mehalov | 2 | Daughter | — | Pennsylvania |
| 55 | James Baskin | 40 | Head | Miner | Alabama |
| 56 | Margaret Baskin | 35 | Wife | — | Alabama |
| 57 | Bernice Baskin | 14 | Daughter | — | Kentucky |
| 58 | Oliver Carter | 38 | Head | Laborer | Virginia |
| 59 | Gladys Carter | 29 | Wife | — | North Carolina |
| 60 | Margaret Carter | 2 | Daughter | — | Pennsylvania |
| 61 | Ronnie Carter | 1 | Son | — | Pennsylvania |
| 62 | Lamar Patterson | 6 | Nephew | — | Pennsylvania |
| 63 | Aaron Hinnefield | 54 | Head | Laborer | Georgia |
| 64 | Pricilla Hinnefield | 68 | Wife | — | Alabama |
| 65 | Albert Malloy | 37 | Head | Miner | South Carolina |
| 66 | Douglas Sydnor | 37 | Lodger Head | Laborer | Virginia |
| 67 | Edna Sydnor | 33 | Wife | — | Virginia |
| 68 | Allen Henry Sydnor | 14 | Son | — | Pennsylvania |
| 69 | Alma Sydnor | 13 | Daughter | — | Virginia |
| 70 | Fred Mcclellan | 25 | Head | Miner | Illinois |
| 71 | Leona Mcclellan | 20 | Wife | — | Illinois |
| 72 | Caroline Mcclellan | 1 | Daughter | — | Pennsylvania |
| 73 | James Alexander | 50 | Head | Miner | Tennessee |
| 74 | Cora Alexander | 42 | Wife | — | Virginia |
| 75 | James Jr Alexander | 9 | Son | — | Pennsylvania |
| 76 | Alberta Alexander | 6 | Daughter | — | Pennsylvania |
| 77 | Hosia Abner | 45 | Head | Miner | Alabama |
| 78 | Hattie Abner | 42 | Wife | — | Mississippi |
| 79 | Henry Abner | 5 | Son | — | Pennsylvania |
| 80 | Bernett Scott | 38 | Head | Miner | South Carolina |
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)