MC
Mary Callahan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, New Jersey
Our Model Tree links this Mary Callahan across the 1930 and 1940 US Censuses in Essex-County, New Jersey (XGBoost, ~Confirmed) — first a spouse (b.~1909), then head of a 8-person household.
Age 31
b. ~1909
Female
Spouse
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, New Jersey |
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Orange City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Orange City |
| Est. Birth Year | ~1909 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Callahan | Daughter | — | 10 | ~1930 |
| Louise Callahan | Daughter | — | 3 | ~1937 |
| Elizabeth Callahan | Daughter | — | 12 | ~1928 |
| Helen Callahan | Daughter | — | 8 | ~1932 |
| Alice Callahan | Daughter | — | 5 | ~1935 |
| James Callahan | Head | — | 40 | ~1900 |
| James Callahan | Son | — | 6 | ~1934 |
| Mary Callahan | Spouse | — | 31 | ~1909 |
Census Appearances
1930
Essex, New …
Spouse, age 21
Essex, New Jersey · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 15 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Electrician |
| Industry | Tel Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Essex-County, New …
Spouse, age 31
Essex-County, New Jersey · implied b. ~1909 — 8 household members
| Surname | Callahan |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Orange City |
| 1935 Residence (County) | Essex |
| Class of Worker | 0 |
| 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 Callahan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Callahan
Spouse · 1940 · age 31 · b. ~1909 · 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 — Essex-County, New Jersey
Open full size
1940 US Federal Census — Essex-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02339-00569)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Francis Callahan | 35 | Head | Truck Driver | New Jersey |
| 42 | James F. Callahan | 40 | Head | Truck Driver | New Jersey |
| 43 | Mary Callahan THIS PERSON | 31 | Wife | — | New Jersey |
| 44 | Elizabeth Callahan | 12 | Daughter | — | New Jersey |
| 45 | Dorothy Callahan | 10 | Daughter | — | New Jersey |
| 46 | Helen Callahan | 8 | Daughter | — | New Jersey |
| 47 | James Jr. Callahan | 6 | Son | — | New Jersey |
| 48 | Alice Callahan | 5 | Daughter | — | New Jersey |
| 49 | Louise Callahan | 3 | Daughter | — | New Jersey |
| 50 | Peter Pedeo | 67 | Head | Port Block | Italy |
| 51 | Philomena Pedeo | 29 | Daughter | Wrapper | New Jersey |
| 52 | Mary Pedeo | 26 | Daughter | Piece Worker | New Jersey |
| 53 | Henry Pedeo | 23 | Son | Piece Worker | New Jersey |
| 54 | Frank Pedeo | 20 | Son | New Worker | New Jersey |
| 55 | Clara Pedeo | 16 | Daughter | New Worker | New Jersey |
| 56 | Ida Pedeo | 14 | Daughter | — | New Jersey |
| 57 | John Salesta | 61 | Head | — | Italy |
| 58 | Lucy Salesta | 54 | Wife | — | Italy |
| 59 | James Salesta | 25 | Son | Polisher | Pennsylvania |
| 60 | Dominick Salesta | 23 | Son | Ticket Taker | Pennsylvania |
| 61 | Ruth Salesta | 17 | Daughter | — | New Jersey |
| 62 | Salvatore Salesta | 11 | Son | — | New Jersey |
| 63 | Vincent Salesta | 22 | Son | Laborer | New Jersey |
| 64 | Elizabeth Hartwick | 52 | Head | — | New York |
| 65 | Ethel Hartwick | 24 | Daughter | Sewing | New Jersey |
| 66 | Mary Ann Hartwick | 22 | Daughter | New Worker | New Jersey |
| 67 | Netta Hartwick | 17 | Daughter | New Worker | New Jersey |
| 68 | Mildred Hartwick | 17 | Daughter | New Worker | New Jersey |
| 69 | Edna Hartwick | 13 | Daughter | — | New Jersey |
| 70 | Edward Hartwick | 11 | Son | — | New Jersey |
| 71 | Parochial School | None | Maintainer | — | — |
| 72 | Olga Corbo | 28 | Sister | Teacher | Massachusetts |
| 73 | Beatrice Ferrigno | 20 | Sister | Teacher | New Jersey |
| 74 | Rita Rondo | 48 | Sister | Teacher | Italy |
| 75 | Rosalia Girgenti | 35 | Sister | Teacher | Italy |
| 76 | Pasquale Marucci | 68 | Head | Proprietor | Italy |
| 77 | Ely Edith Marucci | 66 | Wife | — | Italy |
| 78 | Leonard Mazzone | 51 | Head | Inspector | Italy |
| 79 | Peter Marucci | 32 | Head | Proprietor | New Jersey |
| 80 | Philomena Marucci | 32 | Wife | — | New Jersey |
Related Census Records
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)