MM
Mary Mcgrath — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Mary Mcgrath across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1877), then head of a 3-person household.
Age 63
b. ~1877
Female
Spouse
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | McGrath |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same house |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | New York |
| Est. Birth Year | ~1877 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcgrath | Daughter | — | 12 | ~1928 |
| Lawrence Mcgrath | Head | — | 65 | ~1875 |
| Mary Mcgrath | Spouse | — | 63 | ~1877 |
Census Appearances
1920
New York, …
Spouse, age 45
New York, New York · implied b. ~1875 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Housewife |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Queens, New …
Spouse, age 55
Queens, New York · implied b. ~1875 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1903 |
| Age at First Marriage | 22 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | Irish |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Kings-County, New …
Spouse, age 63
Kings-County, New York · implied b. ~1877 — 3 household members
| Surname | McGrath |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | H-1 |
| 1935 Residence | Same house |
| 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 Mcgrath across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcgrath
Spouse · 1940 · age 63 · b. ~1877 · New York
★ 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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
18 people indexed on this census page (nara:1940:m-t0627-02566-00394)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas Ryan | 30 | Head | Salesman | New York |
| 2 | Anna Ryan | 28 | Wife | — | New York |
| 3 | Anna Ryan | 6 | Daughter | — | New York |
| 4 | Thomas Ryan | 5 | Son | — | New York |
| 5 | John Ryan | 1 | Son | — | New York |
| 6 | William Ryan | 65 | Father | — | Newfoundland |
| 7 | Michael Stefano | 43 | Head | Felt Cutter | New York |
| 8 | Julia Stefano | 37 | Wife | — | New York |
| 9 | Mildred Stefano | 18 | Daughter | Felt Cutter | New York |
| 10 | Michael Stefano | 17 | Son | Machine H | New York |
| 11 | Helen Stefano | 12 | Daughter | — | New York |
| 12 | Joseph Stefano | 5 | Son | — | New York |
| 13 | Mary Stefano | 0 | Daughter | — | New York |
| 14 | Lawrence Mcgrath | 65 | Head | — | New York |
| 15 | Mary Mcgrath THIS PERSON | 63 | Wife | — | Ireland |
| 16 | Margaret Mcgrath | 12 | Daughter | — | New York |
| 17 | Gus Speros | 59 | Head | Proprietor | Greece |
| 18 | Alma Speros | 29 | Wife | — | Greece |
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)