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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 head (b.~1870), then head of a 2-person household.
Age 70
b. ~1870
Female
Head
Born: Ireland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Mahoney |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | New York |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Living on Savings |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Living On Savings |
| Township / Ward | New York City |
| Est. Birth Year | ~1870 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mahoney | Daughter | — | 40 | ~1900 |
| Mary Mahoney | Head | — | 70 | ~1870 |
Census Appearances
1920
Kings, New …
Spouse, age 51
Kings, New York · implied b. ~1869 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Martha |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1894 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1900 |
| Birthplace (normalized) | ireland |
1930
Kings, New …
Other, age 60
Kings, New York · implied b. ~1870
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Mahoney |
| Given Name | Martha |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1893 |
| Age at First Marriage | 31 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Kings-County, New …
Head, age 70
Kings-County, New York · implied b. ~1870 — 2 household members
| Surname | Mahoney |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | New York |
| Naturalization Status | Naturalized |
| Occupation | Living on Savings |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 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
Head · 1940 · age 70 · b. ~1870 · 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
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02547-00892)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Junius Greening | 22 | Wife | — | New York |
| 42 | Daughter Judice | 4 | Daughter | — | New York |
| 43 | J. Bert Pigault | 44 | Head | Salesman | Massachusetts |
| 44 | Constance Lewis | 28 | Head | Teacher | Illinois |
| 45 | Lawrence Lewis | 20 | Brother | — | Jersey City |
| 46 | Junius Demerline | 50 | Wife | — | New York |
| 47 | John Jos. Demerline | 20 | Head | Printer | New York |
| 48 | Raymond Skorr | 26 | Head | Clerk | New York |
| 49 | Charles Driscoll | 21 | Roomer | Law Dept City | New York |
| 50 | Frank Alexander | 45 | Head | Owner Of Tailor Shop | Greece |
| 51 | George Shing | 64 | Head | Owner Of Laundry | China |
| 52 | John Pisano | 45 | Head | Owner Of Candy Store | Italy |
| 53 | Samuel Reynaldo | 40 | Head | Owner Of Grocery Store | Spain |
| 54 | Amelia Reynaldo | 36 | Wife | — | Spain |
| 55 | Joseph Reynaldo | 12 | Son | — | West Virginia |
| 56 | Carmen Reynaldo | 12 | Daughter | — | West Virginia |
| 57 | Jose Ramon Perez | 51 | Head | On Relief | Spain |
| 58 | Luis Perez | 47 | Wife | — | New Orleans |
| 59 | Frank Mamo | 30 | Head | W.P.A. Laborer | New Orleans |
| 60 | Mary Luisa Mamo | 24 | Wife | — | Porto Rico |
| 61 | Frank Mamo | 7 | Son | — | New York |
| 62 | Elise Mamo | 6 | Daughter | — | New York |
| 63 | Mary Mamo | 5 | Daughter | — | New York |
| 64 | Lina Mamo | 3 | Daughter | — | New York |
| 65 | Joseph Mamo | 2 | Son | — | New York |
| 66 | Mary Mahoney THIS PERSON | 70 | Head | Living On Savings | Ireland |
| 67 | Mary Mahoney | 40 | Daughter | Operator | New York |
| 68 | Frank Shaker | 36 | Head | Laborer | New York |
| 69 | Margaret Shaker | 40 | Wife | — | New York |
| 70 | Edward Shaker | 17 | Son | Looking For Work | New York |
| 71 | Dorothy Shaker | 15 | Daughter | — | New York |
| 72 | Raymond Shaker | 12 | Son | — | New York |
| 73 | William Shaker | 8 | Son | — | New York |
| 74 | Joan Ann Shaker | 3 | Daughter | — | New York |
| 75 | Edward Jos. Rooney | 34 | Head | Unemployed | New York |
| 76 | Agnes Rooney | 32 | Wife | — | New York |
| 77 | James Rooney | 12 | Son | — | New York |
| 78 | Edward Rooney | 9 | Son | — | New York |
| 79 | Bridget Rooney | 54 | Mother | — | Ireland |
| 80 | Paulina Velazquez | 37 | Head | On Relief | Porto Rico |
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)