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Thomas Leonard — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, New York
Our Model Tree links this Thomas Leonard across the 1920, 1930 and 1940 US Censuses in Jefferson-County, New York (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, New York |
| Surname | Leonard |
| Given Name | Thomas R Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Watertown |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Checker |
| Industry | News stand |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1000 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Checker |
| Township / Ward | Watertown |
| Est. Birth Year | ~1917 |
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 |
|---|---|---|---|---|
| Richard Leonard | Son | — | 22 | ~1918 |
| Joseph Leonard | Son | — | 15 | ~1925 |
| Mabel Leonard | Spouse | — | 50 | ~1890 |
| Thomas Leonard | Head | — | 46 | ~1894 |
| Thomas Leonard | Son | — | 23 | ~1917 |
Census Appearances
1920
Jefferson, New …
Son, age 1
Jefferson, New York · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Thomas R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Jefferson, New …
Son, age 13
Jefferson, New York · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Thomas Jr |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | newsboy |
| Industry | route |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Jefferson-County, New …
Son, age 23
Jefferson-County, New York · implied b. ~1917 — 5 household members
| Surname | Leonard |
| Given Name | Thomas R Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Watertown |
| 1935 Residence (County) | Jefferson |
| Occupation | Checker |
| Industry | News stand |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1000 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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. Identified parents: father Thomas Leonard (~0.92 confidence) and father Thomas Leonard (~0.92 confidence) and mother Mable Leonard (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Leonard
b. ~1894
Source father
● Household
· direct · ~0.92
Father
Thomas Leonard
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Mable Leonard
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Leonard
Son · 1940 · age 23 · b. ~1917 · New York
★ You are viewing this record
Sibling
Richard Leonard
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Leonard
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Jefferson-County, New York
Open full size
1940 US Federal Census — Jefferson-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02545-00740)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Grace E Publes | 49 | Wife | — | New York |
| 2 | Marcella Phillips | 55 | Head | Teacher | New York |
| 3 | Adelle D Fuller | 74 | Head | — | New York |
| 4 | Joseph Mcdonald | 64 | Head | Brakeman | Canada |
| 5 | Mary A Mcdonald | 59 | Wife | — | Canada |
| 6 | Ethel R Mcdonald | 29 | Daughter | — | New Jersey |
| 7 | J. Louis Grappotte | 64 | Head | Retired | New York |
| 8 | Grace M Grappotte | 52 | Wife | — | New York |
| 9 | Thurston L Lewis | 55 | Head | Music Teacher | New York |
| 10 | Grace Lewis | 55 | Wife | Proprietor | New York |
| 11 | Violet A Lewis | 43 | Head | — | Massachusetts |
| 12 | David D Kieff | 69 | Head | Architect | New York |
| 13 | Rosalie M Kieff | 59 | Wife | — | New York |
| 14 | Ambrose E Kieff | 29 | Son | Architect | New York |
| 15 | George N Kieff | 20 | Son | — | New York |
| 16 | Ida D Martin | 59 | Head | Retired | New York |
| 17 | Jane A Judd | 75 | Head | — | England |
| 18 | Francis W Judd | 51 | Son | Clothier | England |
| 19 | Clarence H Miner | 50 | Head | Shipping Room | New York |
| 20 | Lillian M Miner | 49 | Wife | — | England |
| 21 | Frederick S Miner | 19 | Son | — | New York |
| 22 | John W Lucas | 82 | Head | Retired | Canada |
| 23 | Walter J Pope | 28 | Grand Son | Bottler | New York |
| 24 | Irene G Pope | 30 | Daughter in law | Receiving Dept | New York |
| 25 | Linda J Pope | 12 | Grand daughter | — | New York |
| 26 | George Marlowe | 68 | Head | Machinist | New York |
| 27 | Catherine Marlowe | 67 | Wife | — | Canada |
| 28 | Gordon H Anthony | 40 | Head | Engineer | New York |
| 29 | Doris M Anthony | 37 | Wife | — | New York |
| 30 | Wilson Lucy A Anthony | 72 | Mother in law | — | New York |
| 31 | Arthur E Rolfe | 56 | Head | Chauffeur | England |
| 32 | Phoebe Rolfe | 61 | Wife | — | England |
| 33 | Elsie M Reynolds | 34 | Lodger | Maid | England |
| 34 | George Mcgillis | 54 | Head | Janitor | New York |
| 35 | Marie Mcdonald | 60 | Sister | Practical Nurse | Michigan |
| 36 | Thomas R Leonard | 46 | Head | Buyer Of Old Gold | New York |
| 37 | Mabel A Leonard | 50 | Wife | Practical Nurse | New York |
| 38 | Thomas R Jr Leonard THIS PERSON | 23 | Son | Checker | New York |
| 39 | Richard Leonard | 22 | Son | Laborer | New York |
| 40 | Joseph P Leonard | 15 | Son | — | New York |
Pedigree Summary
Thomas + 2 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)