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Mary Hartman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, New Jersey
Our Model Tree links this Mary Hartman across the 1930 and 1940 US Censuses in Middlesex-County, New Jersey (XGBoost, ~Confirmed) — first a daughter (b.~1916), then head of a 7-person household.
Age 24
b. ~1916
Female
Daughter
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, New Jersey |
| Surname | Hartman |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | South River Borough |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Machine Operator |
| Industry | Powder Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Machine Operator |
| Township / Ward | South River Borough |
| Est. Birth Year | ~1916 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Hartman | Daughter | — | 2 | ~1938 |
| Mary Hartman | Daughter | — | 24 | ~1916 |
| Andrew Genco | Head | — | 50 | ~1890 |
| Joseph Hartman | Son | — | 25 | ~1915 |
| Alex Genco | Son | — | 30 | ~1910 |
| Ralph Hartman | Son | — | 5 | ~1935 |
| Mary Genco | Spouse | — | 51 | ~1889 |
Census Appearances
1930
Middlesex, New …
Other, age 14
Middlesex, New Jersey · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hartman |
| Given Name | Marian |
| Relationship to Head | Niece |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Middlesex-County, New …
Daughter, age 24
Middlesex-County, New Jersey · implied b. ~1916 — 7 household members
| Surname | Hartman |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | South River Borough |
| 1935 Residence (County) | Middlesex |
| Occupation | Machine Operator |
| Industry | Powder Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 496 |
| 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 Mary Hartman across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hartman
Daughter · 1940 · age 24 · b. ~1916 · New Jersey
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Sibling
Alex Genco
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ralph Hartman
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Hartman
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Hartman
Sibling · 1940 · age 2
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 — Middlesex-County, New Jersey
Open full size
1940 US Federal Census — Middlesex-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02363-00917)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Kostuk Borowski | 54 | Head | Proprietor | Poland |
| 2 | Anna Borowski | 50 | Wife | — | Poland |
| 3 | Otto Borowski | 12 | Son | — | New Jersey |
| 4 | Jacob Kamanovich | 51 | Head | Laborer | Russia |
| 5 | Anna Kamanovich | 44 | Wife | Operator | Russia |
| 6 | Stella Kamanovich | 13 | Daughter | — | New Jersey |
| 7 | Lydia Kamanovich | 5 | Daughter | — | New Jersey |
| 8 | Thomas Durvich | 26 | Lodger | Weaver | New Jersey |
| 9 | Frank Kykulski | 31 | Head | Laborer | New York |
| 10 | Mary Kykulski | 27 | Wife | — | New Jersey |
| 11 | Theodore Kykulski | 4 | Son | — | New Jersey |
| 12 | Joan Kykulski | 3 | Daughter | — | New Jersey |
| 13 | Philip Zasinnych | 57 | Head | Laborer | Russia |
| 14 | Anna Zasinnych | 50 | Wife | — | Russia |
| 15 | Mary Fillan | 20 | Niece | Machine Operator | New Jersey |
| 16 | John Belemisk | 35 | Head | Chemist | New Jersey |
| 17 | Anna Belemisk | 28 | Wife | Typist | New Jersey |
| 18 | John Jr Belemisk | 8 | Son | — | New Jersey |
| 19 | Leontine Belemisk | 6 | Daughter | — | New Jersey |
| 20 | Andrew Genco | 50 | Head | Watchman | Russia |
| 21 | Mary Genco | 51 | Wife | — | Russia |
| 22 | Alex Genco | 30 | Son | Guard | Russia |
| 23 | Mary Hartman THIS PERSON | 24 | Daughter | Machine Operator | New Jersey |
| 24 | Joseph Hartman | 25 | Son | Butcher | New Jersey |
| 25 | Ralph Hartman | 5 | Son | — | New Jersey |
| 26 | Mary Hartman | 2 | Daughter | — | New Jersey |
| 27 | Frank Stingela | 21 | Head | Fireman | New Jersey |
| 28 | John Stingela | 25 | Son | Carpenter | New Jersey |
| 29 | George Fedorov | 62 | Head | Proprietor | Hungary |
| 30 | Julia Fedorov | 59 | Wife | Packer | Hungary |
| 31 | Betty Fedorov | 30 | Daughter | Packer | New Jersey |
| 32 | Ethel Fedorov | 26 | Daughter | Mechanic | New Jersey |
| 33 | George Fedorov | 22 | Son | Laborer | New Jersey |
| 34 | Steve Fedorov | 18 | Son | — | New Jersey |
| 35 | Julia Huber | 57 | Head | — | Russia |
| 36 | John Huber | 26 | Son | Laborer | Ohio |
| 37 | Elsie Huber | 23 | Daughter | Operator | New Jersey |
| 38 | Fred Huber | 25 | Son | — | New Jersey |
| 39 | Anna Basara | 30 | Head | Operator | New Jersey |
| 40 | William Basara | 24 | Head | Truck Driver | New Jersey |
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)