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Mary Mahoney — 1940 US Census Record
Model Tree available1940 United States Federal Census · Camden-County, New Jersey
Our Model Tree links this Mary Mahoney across the 1920, 1930 and 1940 US Censuses in Camden-County, New Jersey (XGBoost, ~Confirmed), with identified parents Frank & Nora — first a daughter (b.~1919), then head of a 9-person household.
Age 21
b. ~1919
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Camden-County, New Jersey |
| Surname | Mahoney |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Camden City |
| 1935 Residence (County) | Camden |
| Additional Details | |
| Occupation | Typist |
| Industry | Law Office |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 600 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Typist |
| Township / Ward | Camden City |
| Est. Birth Year | ~1919 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Blair Mahoney | Daughter | — | 6 | ~1934 |
| Mary Mahoney | Daughter | — | 21 | ~1919 |
| Lillian Mahoney | Daughter | — | 19 | ~1921 |
| Patricia Mahoney | Daughter | — | 10 | ~1930 |
| Frank Mahoney | Head | — | 44 | ~1896 |
| John Costello | Other | — | 40 | ~1900 |
| Clair Wade | Other | — | 46 | ~1894 |
| Francis Mahoney | Son | — | 17 | ~1923 |
| Nora Mahoney | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Camden, New …
Daughter, age
Camden, New Jersey · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Newfoundland |
| Mother's Birthplace | Newfoundland |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Camden, New …
Daughter, age 10
Camden, New Jersey · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Newfoundland |
| Mother's Birthplace | Newfoundland |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Camden-County, New …
Daughter, age 21
Camden-County, New Jersey · implied b. ~1919 — 9 household members
| Surname | Mahoney |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Camden City |
| 1935 Residence (County) | Camden |
| Occupation | Typist |
| Industry | Law Office |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 600 |
| 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 Mary Mahoney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Mahoney (~0.92 confidence) and mother Nora Mahoney (~0.92 confidence) and mother Norah Mahoney (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Mahoney
b. ~1898
Source father
● Household
· direct · ~0.92
Mother
Nora Mahoney
b. ~1898
Source mother
● Household
· direct · ~0.92
Mother
Norah Mahoney
b. ~1899
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Mahoney
Daughter · 1940 · age 21 · b. ~1919 · New Jersey
★ You are viewing this record
Sibling
Francis Mahoney
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Mahoney
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Blair Mahoney
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Mahoney
Sibling · 1940 · age 19
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 — Camden-County, New Jersey
Open full size
1940 US Federal Census — Camden-County, New Jersey
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-02394-00830)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arlene Morris | 3 | Daughter | — | New Jersey |
| 42 | Arabella Harvey | 69 | Mother-in-law | — | New Jersey |
| 43 | Frank Mahoney | 44 | Head | Iron Worker | Newfoundland |
| 44 | Nora Mahoney | 42 | Wife | — | Newfoundland |
| 45 | Mary Mahoney THIS PERSON | 21 | Daughter | Typist | New Jersey |
| 46 | Lillian Mahoney | 19 | Daughter | Clerk | New Jersey |
| 47 | Francis Mahoney | 17 | Son | — | New Jersey |
| 48 | Patricia Mahoney | 10 | Daughter | — | New Jersey |
| 49 | Blair Mahoney | 6 | Daughter | — | New Jersey |
| 50 | John Costello | 40 | Cousin | Iron Worker | Newfoundland |
| 51 | Clair Wade | 46 | Lodger | Hostess | Newfoundland |
| 52 | Frederick H. Dodd | 65 | Head | Plasterer | England |
| 53 | Josephine P. Dodd | 60 | Wife | — | Pennsylvania |
| 54 | Leonor Dodd | 33 | Daughter | Laborer | New Jersey |
| 55 | Clarence Buckley | 55 | Head | Pharmacist | Pennsylvania |
| 56 | Alice R. Buckley | 55 | Wife | — | Pennsylvania |
| 57 | William A. Townsend | 43 | Head | Supervisor | Maryland |
| 58 | Catherine Townsend | 43 | Wife | — | Delaware |
| 59 | William M. Townsend | 20 | Son | — | New Jersey |
| 60 | Emilio Pitarelli | 63 | Head | Cabinet Maker | Italy |
| 61 | Aida Pitarelli | 65 | Wife | — | Italy |
| 62 | Alfred A. Pitarelli | 25 | Son | — | Italy |
| 65 | John Schreiner | 52 | Head | Police Officer | New Jersey |
| 66 | Barbara Schreiner | 43 | Wife | — | England |
| 67 | Louis Schreiner | 89 | Father | — | New Jersey |
| 68 | Margaret E. Mcnulty | 68 | Mother-in-law | — | England |
| 69 | Joseph Stein | 38 | Nephew | Laborer | New Jersey |
| 70 | Allen Kansline | 51 | Lodger | Janitor | Pennsylvania |
| 71 | George A. Perks | 53 | Head | Clerk | Pennsylvania |
| 72 | Lila Perks | 50 | Wife | — | New Jersey |
| 73 | William H. Andrews | 55 | Head | Accountant | New Jersey |
| 74 | Gertrude Andrews | 42 | Wife | Waitress | New Jersey |
| 75 | Thomas J. Klein | 68 | Lodger | Timekeeper | New Jersey |
| 76 | Julia Walsh | 62 | Head | Secretary | New Jersey |
| 77 | William G. Huttins | 70 | Head | Utility Helper | New Jersey |
| 78 | Lidie J. Huttins | 66 | Wife | Secretary | New Jersey |
| 79 | Son William Jr. | None | M | Auto Parts | — |
Pedigree Summary
Mary + 4 siblings
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)