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Mary Monahan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Mary Monahan across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 2-person household.
Age 52
b. ~1888
Female
Head
Born: Ireland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Monahan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | House Wife |
| Industry | Home |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | New York |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | House Wife |
| Township / Ward | New York City |
| Est. Birth Year | ~1888 |
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 Monahan | Head | — | 52 | ~1888 |
| Raymond Monahan | Son | — | 38 | ~1902 |
Census Appearances
1920
New York, …
Other, age 31
New York, New York · implied b. ~1889 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monahan |
| Given Name | Margaret |
| Relationship to Head | Cook |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1911 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Cook |
| Industry | Private Family |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Westchester, New …
Other, age 42
Westchester, New York · implied b. ~1888 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monahan |
| Given Name | Mary |
| Relationship to Head | Lodger |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Single |
| Birthplace | Ireland |
| Naturalization Status | Alien |
| Year of Immigration | 1910 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Housemaid |
| Industry | Domestic |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Kings-County, New …
Head, age 52
Kings-County, New York · implied b. ~1888 — 2 household members
| Surname | Monahan |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Occupation | House Wife |
| Industry | Home |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | New York |
| 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 Monahan across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Monahan
Head · 1940 · age 52 · b. ~1888 · 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-t0627-02582-00532)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas Jr. Gilfillan | 5 | Son | — | New York |
| 42 | Michael Gilfillan | 0 | Son | — | New York |
| 43 | James Dwyer | 50 | Head | Patrolman | New York |
| 44 | Frances Dwyer | 43 | Wife | House Wife | New York |
| 45 | Frances Dwyer | 20 | Daughter | Typist | New York |
| 46 | Joseph G. Dwyer | 17 | Son | — | New York |
| 47 | Vincent Dwyer | 14 | Son | — | New York |
| 48 | James Dwyer | 13 | Son | — | New York |
| 49 | John P. Gaynor | 53 | Head | Clerk | New York |
| 50 | Margaret M. Gaynor | 53 | Wife | House Wife | New York |
| 51 | Thomas Gaynor | 21 | Son | Messenger | New York |
| 52 | John Gaynor | 16 | Son | — | New York |
| 53 | Alice Gaynor | 8 | Daughter | — | New York |
| 54 | Anna H. Gaynor | 50 | Head | Home Work | New York |
| 55 | Grace Ronan | 40 | Sister-in-law | Electrician | New York |
| 56 | Anna M. Ronan | 7 | Daughter | — | New York |
| 57 | John Philippi | 53 | Head | Own Business | Germany |
| 58 | Frieda Philippi | 40 | Wife | House Wife | Germany |
| 59 | Hildard Philippi | 14 | Daughter | — | New York |
| 60 | Bertha Edelbols | 55 | Head | Clerical | New York |
| 61 | Ann Duffy | 36 | Head | House Wife | Ireland |
| 62 | John Jr. Duffy | 5 | Son | — | New York |
| 63 | Ann Duffy | 2 | Daughter | — | New York |
| 64 | John Duffy | 40 | Head | Laborer | New York |
| 65 | Mary Monahan THIS PERSON | 52 | Head | House Wife | Ireland |
| 66 | Raymond Monahan | 38 | Son | Clerk | New York |
| 67 | — | None | — | — | — |
| 68 | — | None | — | — | — |
| 69 | — | None | — | — | — |
| 70 | Ida P. D. Harms | 75 | Head | House Wife | Germany |
| 71 | Alfred E. Harms | 35 | Son | Salesman | New York |
| 72 | Gertrude H. Benz | 38 | Daughter | House Wife | New York |
| 73 | Sylvester Benz | 57 | Son-in-law | — | New York |
| 74 | — | None | — | — | — |
| 75 | — | None | — | — | — |
| 76 | — | None | — | — | — |
| 77 | Thomas O'Meara | 36 | Head | Salesman | New York |
| 78 | Edna O'Meara | 29 | Wife | House Wife | New York |
| 79 | Gerard O'Meara | 5 | Son | — | New York |
| 80 | Raymond O'Meara | 3 | Son | — | 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)