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William Leonard — 1940 US Census Record
Model Tree available1940 United States Federal Census · Essex-County, New Jersey
Our Model Tree links this William Leonard across the 1920, 1930 and 1940 US Censuses in Essex-County, New Jersey (XGBoost, ~Confirmed), with identified parents Grace & Ira — first a son (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, New Jersey |
| Surname | Leonard |
| Given Name | William T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | East Orange city |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | Accountant |
| Industry | Dept Store |
| Class of Worker | PW |
| Hours Worked | 65 |
| Income (1939) | 2500 |
| Highest Grade | C-3 |
| 1935 Residence | Same House |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Accountant |
| Township / Ward | East Orange City |
| Est. Birth Year | ~1910 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Grace Leonard | Head | — | 62 | ~1878 |
| William Leonard | Son | — | 30 | ~1910 |
| Robert Leonard | Son | — | 27 | ~1913 |
| Lawrence Leonard | Son | — | 19 | ~1921 |
Census Appearances
1920
Essex, New …
Son, age 10
Essex, New Jersey · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New York |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Essex, New …
Son, age 20
Essex, New Jersey · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New York |
| Mother's Birthplace | New Jersey |
| Occupation | Clerk |
| Industry | Bank Stock |
| Class of Worker | W |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Essex-County, New …
Son, age 30
Essex-County, New Jersey · implied b. ~1910 — 4 household members
| Surname | Leonard |
| Given Name | William T. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | East Orange city |
| 1935 Residence (County) | Essex |
| Occupation | Accountant |
| Industry | Dept Store |
| Class of Worker | PW |
| Hours Worked | 65 |
| Income (1939) | 2500 |
| Highest Grade | C-3 |
| 1935 Residence | Same House |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 William Leonard across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Grace Leonard (~0.92 confidence) and father Ira Leonard (~0.92 confidence) and mother Alice Leonard (~0.92 confidence) and father Ira Leonard (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Grace Leonard
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
Ira Leonard
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Alice Leonard
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
Ira Leonard
b. ~1885
Source father
● Household
· direct · ~0.92
This person
Anchor record
William Leonard
Son · 1940 · age 30 · b. ~1910 · New Jersey
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Sibling
Lawrence Leonard
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Leonard
Sibling · 1940 · age 27
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 — Essex-County, New Jersey
Open full size
1940 US Federal Census — Essex-County, New Jersey
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-02332-00765)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James H. Carey | 72 | Head | Laborer | Mass. |
| 2 | Mary Carey | 69 | Wife | — | Eire |
| 3 | Elizabeth P. Milling | 64 | Head | — | Eire |
| 4 | Virginia Milling | 32 | Daughter | Teacher | New York |
| 5 | Patrick J. Powers | 54 | Brother | Buyer | Eire |
| 6 | Grace M. Leonard | 62 | Head | — | New York |
| 7 | William T. Leonard THIS PERSON | 30 | Son | Accountant | New Jersey |
| 8 | Robert Leonard | 27 | Son | — | Tennessee |
| 9 | Lawrence Leonard | 19 | Son | Clerk | New Jersey |
| 10 | George Gaudert|Gaudert | 69 | Head | — | New York |
| 11 | Nevada Losaw | 68 | Head | Carpenter | New Jersey |
| 12 | Levinie Losaw | 69 | Wife | — | New Jersey |
| 13 | Bridget Donovan | 76 | Head | Owner | Eire |
| 14 | Robert H. Thompson | 60 | Head | Tool And Dye Maker | Tennessee |
| 15 | Mary E. Thompson | 60 | Wife | — | Tennessee |
| 16 | John F. Mcquillan | 51 | Head | Tool Maker | Penna. |
| 17 | Clara M. Mcquillan | 50 | Wife | — | Penna. |
| 18 | John F. Jr. Mcquillan | 26 | Son | Draftsman | Penna. |
| 19 | Robert T. Mcquillan | 21 | Son | Machinist | Penna. |
| 20 | Grace Mcquillan | 13 | Daughter | — | Maryland |
| 21 | Chas H. Matchett | 56 | Head | Asst Credit Mgr | New Jersey |
| 22 | Wilhelmina Matchett | 61 | Wife | — | New Jersey |
| 23 | Julia J. Barton | 66 | Head | — | New Jersey |
| 24 | Dora A. Witting | 64 | Sister | — | New Jersey |
| 25 | Alice W. Nelson | 49 | Sister | Supervisor | New Jersey |
| 26 | John Morris | 70 | Head | Tool Maker | Scotland |
| 27 | Margaret Morris | 68 | Wife | — | Scotland |
| 28 | Henry J. Fox | 28 | Head | Clerk | New Jersey |
| 29 | Grace Fox | 25 | Wife | — | New Jersey |
| 30 | Carol Ann Fox | 1 | Daughter | — | New Jersey |
| 31 | Joseph H. Crump | 46 | Head | Super. Launderer | New Jersey |
| 32 | Hazel A. Crump | 45 | Wife | — | New Jersey |
| 33 | Muriel Crump | 20 | Daughter | — | New Jersey |
| 34 | Jane Crump | 11 | Daughter | — | New Jersey |
| 35 | Florence Crump | 10 | Daughter | — | New Jersey |
| 36 | Raymond Walker | 46 | Head | Clerk | New Jersey |
| 37 | Hazel Walker | 45 | Wife | Demonstrator | New Jersey |
| 38 | Frances Casterlin | 68 | Head | — | New York |
| 39 | Gladys Casterlin | 39 | Daughter | Secretary | Massachusetts |
Pedigree Summary
William + 2 siblings
Gen 1 · 4 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)