JH
John Hart — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this John Hart across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed), with identified parents Theresa & John — first a son (b.~1907), then head of a 4-person household.
Age 33
b. ~1907
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Hart |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | Mail Clerk |
| Industry | Steam R.R. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2000 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Mail Clerk |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1907 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Hart | Head | — | 60 | ~1880 |
| John Hart | Son | — | 33 | ~1907 |
| Michael Hart | Son | — | 31 | ~1909 |
| Theresa Hart | Spouse | — | 63 | ~1877 |
Census Appearances
1920
Hudson, New …
Son, age 14
Hudson, New Jersey · implied b. ~1906 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Son, age 24
Hudson, New Jersey · implied b. ~1906 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Occupation | Iceman |
| Industry | Steam Railroad |
| 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 …
Son, age 33
Hudson-County, New Jersey · implied b. ~1907 — 4 household members
| Surname | Hart |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Occupation | Mail Clerk |
| Industry | Steam R.R. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 2000 |
| Highest Grade | No 8 |
| 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 John Hart across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Theresa Hart (~0.92 confidence) and father John Hart (~0.92 confidence) and father John Hart (~0.92 confidence) and mother Theresa Hart (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Theresa Hart
b. ~1877
Source mother
● Household
· direct · ~0.92
Father
John Hart
b. ~1880
Source father
● Household
· direct · ~0.92
Father
John Hart
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Theresa Hart
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Hart
Son · 1940 · age 33 · b. ~1907 · New Jersey
★ You are viewing this record
Sibling
Michael Hart
Sibling · 1940 · age 31
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-t0627-02410-00112)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arthur Bertelsen | 65 | Wife | — | England |
| 42 | Daphne Bertelsen | 39 | Daughter | Clerk | New Jersey |
| 43 | John Reinhold | 50 | Head | Letter Carrier | New York |
| 44 | Emma Reinhold | 42 | Wife | — | New Jersey |
| 45 | Gertrude Reinhold | 16 | Daughter | — | New Jersey |
| 46 | Stephen Hart | 36 | Head | Gate Man | New Jersey |
| 47 | Mildred Hart | 31 | Wife | — | New Jersey |
| 48 | Stephen Hart | 12 | Son | — | New Jersey |
| 49 | William Hart | 10 | Son | — | New Jersey |
| 50 | John Hart | 60 | Head | Shipping Clerk | New Jersey |
| 51 | Theresa Hart | 63 | Wife | — | New Jersey |
| 52 | John Hart THIS PERSON | 33 | Son | Mail Clerk | New Jersey |
| 53 | Michael Hart | 31 | Son | Milk Handler | New Jersey |
| 54 | Joseph Costa | 34 | Head | Barber | Italy |
| 55 | Anna Costa | 31 | Wife | — | Italy |
| 56 | Nancy Costa | 3 | Daughter | — | New Jersey |
| 57 | Jasper Raman | 62 | Head | — | Italy |
| 58 | Margaret Raman | 55 | Wife | — | Italy |
| 59 | Joseph Raman | 19 | Son | New Worker | New Jersey |
| 60 | Armando Raman | 15 | Son | — | New Jersey |
| 61 | Angelina Raman | 13 | Daughter | — | New Jersey |
| 62 | Elvira Raman | 10 | Daughter | — | New Jersey |
| 63 | Lucy De Michele | 31 | Daughter | Operator | Italy |
| 64 | Frank Nicola | 39 | Head | — | Italy |
| 65 | Josephine Nicola | 34 | Wife | — | Italy |
| 66 | Frances Nicola | 7 | Son | — | Mass. |
| 67 | Mary O'Hara | 39 | Head | Operator | New Jersey |
| 68 | John O'Hara | 12 | Son | — | New Jersey |
| 69 | Joseph Bianca | 39 | Head | Cook | Brazil |
| 70 | Clara Bianca | 31 | Wife | — | Italy |
| 71 | Joseph Bianca | 5 | Son | — | New Jersey |
| 72 | Donald Diem | 44 | Head | Driver | New Jersey |
| 73 | Louise Diem | 43 | Wife | — | New Jersey |
| 74 | Helen Diem | 22 | Daughter | Tube Maker | New Jersey |
| 75 | Harriet Schreken | 63 | Head | — | New Jersey |
| 76 | Vincent Nueze | 36 | Head | Painter | New Jersey |
| 77 | Gladys Nueze | 43 | Wife | Packer | New Jersey |
| 78 | Edward Amola | 27 | Head | Auto Mech | New Jersey |
| 79 | Patricia Amola | 23 | Wife | — | Ark. |
| 80 | Edward Amola | 2 | Son | — | New Jersey |
Pedigree Summary
John + 1 sibling
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)