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Thomas Leonard — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Thomas Leonard across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Leonard |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Brooklyn |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Butcher |
| Industry | Meats Mkt. |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 561 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Butcher |
| Township / Ward | Brooklyn |
| Est. Birth Year | ~1915 |
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 |
|---|---|---|---|---|
| James Leonard | Head | — | 52 | ~1888 |
| James Leonard | Son | — | 18 | ~1922 |
| Thomas Leonard | Son | — | 25 | ~1915 |
| Anna Leonard | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Kings, New …
Son, age 5
Kings, New York · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | none |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Kings, New …
Son, age 15
Kings, New York · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Son, age 25
Kings-County, New York · implied b. ~1915 — 4 household members
| Surname | Leonard |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | Brooklyn |
| 1935 Residence (County) | Kings |
| Occupation | Butcher |
| Industry | Meats Mkt. |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 561 |
| 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 James Leonard (~0.92 confidence) and father James Leonard (~0.92 confidence) and father Morris Leonard (~0.92 confidence) and mother Anna Leonard (~0.92 confidence) and mother Anna Leonard (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Leonard
b. ~1888
Source father
● Household
· direct · ~0.92
Father
James Leonard
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Morris Leonard
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Anna Leonard
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Anna Leonard
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Leonard
Son · 1940 · age 25 · b. ~1915 · New York
★ You are viewing this record
Sibling
James Leonard
Sibling · 1940 · age 18
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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02563-00350)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Murphy | 31 | Head | Litter | New York |
| 2 | Margaret Murphy | 27 | Wife | — | New York |
| 3 | Alice Murphy | 10 | Daughter | — | New York |
| 4 | William Jr. Murphy | 3 | Son | — | New York |
| 5 | Kenneth Murphy | 2 | Son | — | New York |
| 6 | Norman Mendelsohn | 38 | Head | Steam Fitter | New York |
| 7 | Regina Mendelsohn | 37 | Wife | — | New York |
| 8 | Richard Mendelsohn | 18 | Son | Engraving | New York |
| 9 | Ronald Mendelsohn | 13 | Son | — | New York |
| 10 | Elizabeth Brown | 45 | Head | Folder | New York |
| 11 | Marion Brown | 25 | Daughter | General Office | New York |
| 12 | Ruth Brown | 11 | Daughter | — | New York |
| 13 | Daniel Brown | 9 | Son | — | New York |
| 14 | Lottie Grimm | 50 | Head | — | New York |
| 15 | Mary A. Grimm | 22 | Daughter | General Worker | New York |
| 16 | Charlotte J. Grimm | 20 | Daughter | General Worker | New York |
| 17 | Anthony C. Casper | 61 | Boarder | Handy Man | New York |
| 18 | Harry Freedman | 49 | Head | Car Washer | Canada |
| 19 | Mary Lottie Freedman | 43 | Wife | — | New York |
| 20 | Howard Gannon | 22 | Step-son | Manager | New York |
| 21 | Francis Gannon | 19 | Step-son | — | New York |
| 22 | Thomas Mcclimont | 32 | Head | Helper | New York |
| 23 | Evelyn Mcclimont | 30 | Wife | — | New York |
| 24 | Thomas E. Mcclimont | 10 | Son | — | New York |
| 25 | John F. Mcclimont | 4 | Son | — | New York |
| 26 | Mary L. Murphy | 57 | Head | Ticket Agent | New York |
| 27 | Mary R. Murphy | 28 | Daughter | Clerk | New York |
| 28 | Lawrence F. Murphy | 25 | Son | Truck Driver | New York |
| 29 | Michael Martini | 43 | Head | Machine Maker | Italy |
| 30 | Nicolina Martini | 34 | Wife | Finishing | Italy |
| 31 | Angelina Martini | 10 | Daughter | — | New York |
| 32 | Frederick Heiser | 32 | Head | Janitor | New York |
| 33 | Florence Heiser | 30 | Wife | — | New York |
| 34 | Joan Heiser | 9 | Daughter | — | New York |
| 35 | Ronald Heiser | 3 | Son | — | New York |
| 36 | Margaret Heiser | 56 | Mother | Matron | New York |
| 37 | James Leonard | 52 | Head | Printer | New York |
| 38 | Anna Leonard | 49 | Wife | — | New York |
| 39 | Thomas Leonard THIS PERSON | 25 | Son | Butcher | New York |
| 40 | James Jr. Leonard | 18 | Son | Butcher | New York |
Pedigree Summary
Thomas + 1 sibling
Gen 1 · 5 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)