JH
John Hart — 1940 US Census Record
Model Tree available1940 United States Federal Census · Union-County, New Jersey
Our Model Tree links this John Hart across the 1920, 1930 and 1940 US Censuses in Union-County, New Jersey (XGBoost, ~Confirmed), with identified parents Ann & Michael — first a son (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Union-County, New Jersey |
| Surname | Hart |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth |
| 1935 Residence (County) | Union |
| Additional Details | |
| Occupation | Elevator Operator |
| Industry | Office Building |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1240 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Elevator Operator |
| Township / Ward | Elizabeth |
| Est. Birth Year | ~1911 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Ann Hart | Head | — | 69 | ~1871 |
| John Hart | Son | — | 29 | ~1911 |
| Michael Hart | Son | — | 25 | ~1915 |
Census Appearances
1920
Hudson, New …
Son, age 9
Hudson, New Jersey · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Scotland |
| 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 19
Hudson, New Jersey · implied b. ~1911 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Scotland |
| Occupation | chauffeur |
| Industry | truck |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Union-County, New …
Son, age 29
Union-County, New Jersey · implied b. ~1911 — 3 household members
| Surname | Hart |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Elizabeth |
| 1935 Residence (County) | Union |
| Occupation | Elevator Operator |
| Industry | Office Building |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1240 |
| Highest Grade | Hs 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 John Hart across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Ann Hart (~0.92 confidence) and father Michael Hart (~0.92 confidence) and mother Mary Hart (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Ann Hart
b. ~1871
Source mother
● Household
· direct · ~0.92
Father
Michael Hart
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Mary Hart
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Hart
Son · 1940 · age 29 · b. ~1911 · New Jersey
★ You are viewing this record
Sibling
Michael Hart
Sibling · 1940 · age 25
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 — Union-County, New Jersey
Open full size
1940 US Federal Census — Union-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02397-00766)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Infant Gould | 0 | Son | — | New Jersey |
| 42 | Michael Igoe | 53 | Head | Bartender | New Jersey |
| 43 | Eleanor Igoe | 50 | Wife | — | South Ireland |
| 44 | Joseph Igoe | 34 | Son | Candy Maker | New Jersey |
| 45 | Eleanor Igoe | 32 | Daughter | Teletype Operator | New Jersey |
| 46 | Edward Igoe | 30 | Son | Laborer | New Jersey |
| 47 | Adaline Igoe | 26 | Daughter | Office Clerical | New Jersey |
| 48 | Francis Igoe | 24 | Son | — | New Jersey |
| 49 | Conrad Kauffman | 48 | Head | Foreman Factory | New Jersey |
| 50 | Mary Kauffman | 49 | Wife | — | New Jersey |
| 51 | Harry Kauffman | 15 | Son | — | New Jersey |
| 52 | Clara D Vroom | 58 | Head | Saleslady | New Jersey |
| 53 | George Clark | 81 | Lodger | — | England |
| 54 | Line Blank | None | — | — | — |
| 55 | Giovanni Morielli | 33 | Head | Accessory Polisher | Italy |
| 56 | Christine Morielli | 29 | Wife | — | New Jersey |
| 57 | Dolores Morielli | 7 | Daughter | — | New Jersey |
| 58 | Jeanne H Morielli | 2 | Daughter | — | New Jersey |
| 59 | John H Madura | 28 | Head | Machinist | New Jersey |
| 60 | Alice Madura | 24 | Wife | Winder | New Jersey |
| 61 | John Jr Madura | 2 | Son | — | New Jersey |
| 62 | Fred Foley | 39 | Head | Porter | Irish Free State |
| 63 | Nora Foley | 43 | Wife | — | Irish Free State |
| 64 | Mary Foley | 6 | Daughter | — | New Jersey |
| 65 | Fred Grampp | 30 | Head | Hardware | New Jersey |
| 66 | Gertrude Grampp | 27 | Wife | — | New Jersey |
| 67 | Charles Veltri | 33 | Head | Union Center Laborer | Maryland |
| 68 | Francis Veltri | 30 | Wife | Worker | Penn |
| 69 | Ann Hart | 69 | Head | — | Irish Free State |
| 70 | John Hart THIS PERSON | 29 | Son | Elevator Operator | New Jersey |
| 71 | Michael Hart | 25 | Son | Elevator Operator | New Jersey |
| 72 | William Maher | 32 | Head | Elevator Operator | New York |
| 73 | Catherine Maher | 30 | Wife | — | New Jersey |
| 74 | John Revotis | 32 | Head | Captain | Lithuania |
| 75 | Catherine Revotis | 21 | Wife | Table Waitress | New York |
| 76 | George Ditzel | 27 | Head | Driver | New Jersey |
| 77 | Stella Ditzel | 26 | Wife | — | New Jersey |
| 78 | George Jr Ditzel | 2 | Son | — | New Jersey |
| 79 | Cornelius Hoffman | 51 | Head | City Patrolman | Irish Free State |
| 80 | Mary Hoffman | 50 | Wife | — | New York |
Pedigree Summary
John + 1 sibling
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)