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Mary Leonard — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this Mary Leonard across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed), with identified parents Lawrence & Emily — first a daughter (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Leonard |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | Accountant |
| Industry | Painting Corp. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 960 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Accountant |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1919 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Leonard | Daughter | — | 21 | ~1919 |
| Thomas Leonard | Head | — | 52 | ~1888 |
| Thomas Leonard | Son | — | 18 | ~1922 |
| Hannah Leonard | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Hudson, New …
Daughter, age 1
Hudson, New Jersey · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Muriel |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Daughter, age 11
Hudson, New Jersey · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Muriel |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Messenger |
| Industry | Dental Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Daughter, age 21
Hudson-County, New Jersey · implied b. ~1919 — 4 household members
| Surname | Leonard |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Occupation | Accountant |
| Industry | Painting Corp. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 960 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 Mary Leonard across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Lawrence Leonard (~0.92 confidence) and mother Emily Leonard (~0.92 confidence) and mother Hannah Leonard (~0.92 confidence) and father Thomas Leonard (~0.92 confidence) and father Lawrence Leonard (~0.92 confidence) and mother Emily Leonard (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Lawrence Leonard
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Emily Leonard
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Hannah Leonard
b. ~1887
Source mother
● Household
· direct · ~0.92
Father
Thomas Leonard
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Lawrence Leonard
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Emily Leonard
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Leonard
Daughter · 1940 · age 21 · b. ~1919 · New Jersey
★ You are viewing this record
Sibling
Thomas 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 — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02404-00626)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Agnes Cross | 27 | Wife | 0 | New York |
| 42 | Frances Cross | 9 | Daughter | — | New Jersey |
| 43 | Katherine Cross | 6 | Daughter | — | New Jersey |
| 44 | John J. Walsh | 25 | Head | Porter | New Jersey |
| 45 | Marie Walsh | 24 | Wife | 0 | New Jersey |
| 46 | William J. Dresser | 23 | Head | Porter | New Jersey |
| 47 | Helen R. Dresser | 21 | Wife | 0 | New Jersey |
| 48 | Patrick Ryan | 42 | Head | Laborer | Ireland |
| 49 | Anna Ryan | 38 | Wife | 0 | Ireland |
| 50 | Thomas Ryan | 18 | Son | New Worker | Ireland |
| 51 | Neil Ryan | 16 | Son | 0 | Ireland |
| 52 | Frances Ryan | 9 | Son | — | New Jersey |
| 53 | John Ryan | 7 | Son | — | New Jersey |
| 54 | Dennis Ryan | 4 | Son | — | New Jersey |
| 55 | Frank Brady | 70 | Lodger | Laborer | Ireland |
| 56 | John O'Shea | 50 | Head | Brakeman | Ireland |
| 57 | Margaret O'Shea | 47 | Wife | 0 | New Jersey |
| 58 | Mary Fletcher | 64 | Head | Trimmer | Massachusetts |
| 59 | Thomas Leonard | 52 | Head | Laborer | Ireland |
| 60 | Hannah Leonard | 53 | Wife | 0 | Ireland |
| 61 | Mary Leonard THIS PERSON | 21 | Daughter | Accountant | New Jersey |
| 62 | Thomas Leonard | 18 | Son | 0 | New Jersey |
| 63 | Claus H. Danker | 67 | Head | Grocer | Germany |
| 64 | Sophie Danker | 66 | Wife | 0 | Germany |
| 65 | Helen Danker | 21 | Daughter | Clerk | New Jersey |
| 66 | Herman Danker | 19 | Son | Clerk | New York |
| 67 | William J. Kellett | 40 | Head | Brakeman | New Jersey |
| 68 | Mary Kellett | 34 | Wife | 0 | New Jersey |
| 69 | Mildred Kellett | 10 | Daughter | — | New Jersey |
| 70 | Marie Erikson | 60 | Head | 0 | Finland |
| 71 | William Erikson | 29 | Son | Clerk | New Jersey |
| 72 | Fred Erikson | 26 | Son | Clerk | New Jersey |
| 73 | Edward Erikson | 21 | Son | Clerk | New Jersey |
| 74 | Nicholas B. Turcio | 24 | Head | Truck Driver | New Jersey |
| 75 | Santa A. Turcio | 23 | Wife | 0 | New Jersey |
| 76 | Marie Turcio | 2 | Daughter | — | New Jersey |
| 77 | Walter A. Browser | 36 | Head | Manager | New Jersey |
| 78 | Carrie Browser | 34 | Wife | 0 | New Jersey |
| 79 | Audrey Browser | 10 | Daughter | — | New Jersey |
| 80 | Edith Browser | 5 | Daughter | — | New Jersey |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 6 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)