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Mary Mahoney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Mary Mahoney across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1885), then head of a 6-person household.
Age 55
b. ~1885
Female
Spouse
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Mahoney |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | New York City |
| Est. Birth Year | ~1885 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Mahoney | Daughter | — | 19 | ~1921 |
| Anna Mahoney | Daughter | — | 24 | ~1916 |
| Joseph Mahoney | Head | — | 55 | ~1885 |
| John Mahoney | Son | — | 22 | ~1918 |
| Joseph Mahoney | Son | — | 29 | ~1911 |
| Mary Mahoney | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Bronx, New …
Spouse, age 34
Bronx, New York · implied b. ~1886 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1904 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1912 |
| Birthplace (normalized) | ireland |
1930
Bronx, New …
Spouse, age 44
Bronx, New York · implied b. ~1886 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1902 |
| Age at First Marriage | 21 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Irish |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Kings-County, New …
Spouse, age 55
Kings-County, New York · implied b. ~1885 — 6 household members
| Surname | Mahoney |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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.
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This person
Anchor record
Mary Mahoney
Spouse · 1940 · age 55 · b. ~1885 · New York
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Kings-County, New York
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1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02612-00993)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Andrew B. Crooke | 29 | Head | Counterman | South Carolina |
| 2 | Marie Crooke | 35 | Wife | Clerk | New York |
| 3 | Marie Nolan | 63 | Mother-in-law | — | Switzerland |
| 4 | Lloyd Crown | 16 | Step-son | — | New York |
| 5 | Rosina Kiefer | 64 | Head | — | Germany |
| 6 | John Kiefer | 40 | Son | — | New York |
| 7 | Paul Kiefer | 35 | Son | Printing Agent | New York |
| 8 | Clara Kiefer | 33 | Daughter | Clerk | New York |
| 9 | Paul Kiefer | 17 | Grandson | — | New York |
| 10 | Howard Hartling | 62 | Head | Inspector | Scotland |
| 11 | Agnes Hartling | 61 | Wife | — | Scotland |
| 12 | Alfred Hawes | 28 | Head | Clerical | New York |
| 13 | Rose Hawes | 26 | Wife | — | New York |
| 14 | Kenneth Hawes | 3 | Son | — | New York |
| 15 | Richard Donohue | 59 | Head | — | Pennsylvania |
| 16 | Ralph Donohue | 30 | Head | Repairman | New York |
| 17 | Mary Donohue | 28 | Wife | — | New York |
| 18 | Ralph Donohue | 7 | Son | — | New York |
| 19 | Lottie Plunkett | 52 | Head | — | New York |
| 20 | Rose Plunkett | 84 | Mother | — | New York |
| 21 | Irene C. Allen | 47 | Head | Secretary | New York |
| 22 | Emma Allen | 69 | Mother | — | New York |
| 23 | William Davis | 34 | Head | Teller | New York |
| 24 | Agnes Davis | 32 | Wife | — | New York |
| 25 | Donald Davis | 9 | Son | — | New York |
| 26 | William Jr. Davis | 6 | Son | — | New York |
| 27 | Joseph Mahoney | 55 | Head | — | Ireland |
| 28 | Mary Mahoney THIS PERSON | 55 | Wife | — | Ireland |
| 29 | Joseph Mahoney | 29 | Son | Laborer | New York |
| 30 | Anna Mahoney | 24 | Daughter | Finisher | New York |
| 31 | John Mahoney | 22 | Son | — | New York |
| 32 | Helen Mahoney | 19 | Daughter | — | New York |
| 33 | William Fay | 45 | Head | — | New York |
| 34 | Margaret Fay | 23 | Daughter | — | New York |
| 35 | Barbara Fay | 21 | Daughter | — | New York |
| 36 | William Fay | 20 | Son | Clerk | New York |
| 37 | James Fay | 16 | Son | — | New York |
| 38 | Mary Fay | 14 | Daughter | — | New York |
| 39 | Annie Fenner | 60 | Head | — | New York |
| 40 | Mary D. Fenner | 35 | Daughter | — | New York |
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)