MH
Mary Hartman — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this Mary Hartman across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed), with identified parents Harry & Ida — first a spouse (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Female
Spouse
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Hartman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton City |
| Additional Details | |
| Occupation | Retail Grocery Store |
| Industry | NP |
| Highest Grade | C 2 |
| 1935 Residence | 20 |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Retail Grocery Store |
| Township / Ward | Trenton 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Clarence Hartman | Head | — | 33 | ~1907 |
| John Hartman | Son | — | 1 | ~1939 |
| Mary Hartman | Spouse | — | 30 | ~1910 |
Census Appearances
1920
Mercer, New …
Daughter, age 9
Mercer, New Jersey · implied b. ~1911 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hartman |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Mercer, New …
Daughter, age 19
Mercer, New Jersey · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hartman |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Mercer-County, New …
Spouse, age 30
Mercer-County, New Jersey · implied b. ~1910 — 3 household members
| Surname | Hartman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton City |
| Occupation | Retail Grocery Store |
| Industry | NP |
| Highest Grade | C 2 |
| 1935 Residence | 20 |
| 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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Hartman (~0.92 confidence) and mother Ida Hartman (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Hartman
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Ida Hartman
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Hartman
Spouse · 1940 · age 30 · b. ~1910 · New Jersey
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Mercer-County, New Jersey
Open full size
1940 US Federal Census — Mercer-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02436-00647)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elizabeth Jones | 43 | Wife | — | New Jersey |
| 42 | David Elzcovitz | 44 | Head | City Police | Russia |
| 43 | Jean Elzcovitz | 37 | Wife | — | Pennsylvania |
| 44 | Bernice Elzcovitz | 13 | Daughter | — | New Jersey |
| 45 | Leonard Elzcovitz | 9 | Son | — | New Jersey |
| 46 | Percy Glover | 45 | Head | Retail Grocery Store | England |
| 47 | Ethel Glover | 45 | Wife | Retail Grocery Store | England |
| 48 | Roy Glover | 17 | Son | — | New Jersey |
| 49 | Clarence Hartman | 33 | Head | Retail Grocery Store | New Jersey |
| 50 | Mary Hartman THIS PERSON | 30 | Wife | Retail Grocery Store | New Jersey |
| 51 | John Hartman | 1 | Son | — | New Jersey |
| 52 | Samuel Goldman | 52 | Head | Ice House | New Jersey |
| 53 | Catherine Goldman | 45 | Wife | — | New Jersey |
| 54 | Michael Yestrebski | 32 | Lodger | Steel & Wire Mill | New Jersey |
| 55 | Frank Schnorbus | 51 | Head | Lunchonette | New Jersey |
| 56 | Robert L. Schnorbus | 24 | Son | Lunchonette | New Jersey |
| 57 | Frank Schnorbus | 11 | Son | — | New Jersey |
| 58 | Charles Griffin | 24 | Son in Law | Steel Mill | New Jersey |
| 59 | Betty Griffin | 23 | Daughter | — | New Jersey |
| 60 | Robert L. Griffin | 2 | Grand Son | — | New Jersey |
| 61 | Patricia Griffin | 1 | Grand Daughter | — | New Jersey |
| 62 | William Adams | 45 | Head | Pottery | New Jersey |
| 63 | Roselle Adams | 37 | Wife | — | New Jersey |
| 64 | Elizabeth Adams | 18 | Daughter | Department Store | New Jersey |
| 65 | Roselle Adams | 17 | Daughter | Department Store | New Jersey |
| 66 | Jaculine Adams | 9 | Daughter | — | New Jersey |
| 67 | William Anthony | 34 | Head | Electric & Gas Co. | Pennsylvania |
| 68 | Agnes Anthony | 35 | Wife | — | New Jersey |
| 69 | Jr. Wm. A. Anthony | 5 | Son | — | New Jersey |
| 70 | Robert Henderson | 48 | Head | Pottery | Scotland |
| 71 | Elizabeth Henderson | 51 | Wife | — | Scotland |
| 72 | Robert Henderson | 19 | Son | Woolen Mill | Scotland |
| 73 | Ellis Alleman | 40 | Head | Steam Turbine | Louisiana |
| 74 | Margaret Alleman | 40 | Wife | — | New Jersey |
| 75 | Richard Alleman | 14 | Son | — | New Jersey |
| 76 | William Alleman | 12 | Son | — | New Jersey |
| 77 | John J. Ford | 67 | Head | — | New Jersey |
| 78 | Alma Ford | 68 | Wife | — | Canada-English |
| 79 | Esther Argust | 57 | Head | — | England |
| 80 | William B. Argust | 21 | Son | Steam Turbine | New Jersey |
Pedigree Summary
Mary
Gen 1 · 2 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)