MG
Mary Grace — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this Mary Grace across the 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a spouse (b.~1898), then head of a 8-person household.
Age 42
b. ~1898
Female
Spouse
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Grace |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Borough of Brooklyn |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Borough Of Brooklyn |
| Est. Birth Year | ~1898 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| William Grace | Son | — | 6 | ~1934 |
| James Grace | Son | — | 1 | ~1939 |
| Mary Grace | Spouse | — | 42 | ~1898 |
| Katherine Grace | Daughter | — | 8 | ~1932 |
| William Grace | Head | — | 39 | ~1901 |
| Mary Grace | Daughter | — | 9 | ~1931 |
| Margaret Grace | Daughter | — | 4 | ~1936 |
| Patricia Grace | Daughter | — | 2 | ~1938 |
Census Appearances
1930
Richmond, New …
Other, age 32
Richmond, New York · implied b. ~1898 — 26 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grace |
| Given Name | Mary Mary |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Un |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1884 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | School Teacher |
| Industry | Institution |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Veteran | No |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Kings-County, New …
Spouse, age 42
Kings-County, New York · implied b. ~1898 — 8 household members
| Surname | Grace |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Borough of Brooklyn |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | 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 Grace across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Grace
Spouse · 1940 · age 42 · b. ~1898 · 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-t0627-02558-00531)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Walter Dillman | 36 | Head | City N.Y. | Bklyn |
| 42 | Catherine Dillman | 34 | Wife | — | Bklyn |
| 43 | Thomas Cowboy | 41 | Head | Hospitality | Bklyn |
| 44 | Nora Cowboy | 45 | Wife | — | Bklyn |
| 45 | Thomas Jr Cowboy | 15 | Son | — | Bklyn |
| 46 | Ruth Cowboy | 14 | Daughter | — | Bklyn |
| 47 | Eleanor Cowboy | 13 | Daughter | — | Bklyn |
| 48 | Edward Cowboy | 12 | Son | — | Bklyn |
| 49 | William Cowboy | 12 | Son | — | Bklyn |
| 50 | Sol Debate | 24 | Head | City Of N.Y. | Bklyn |
| 51 | Mildred Debate | 22 | Wife | — | Bklyn |
| 52 | Robert Debate | 3 | Son | — | Bklyn |
| 53 | Richard Debate | 1 | Son | — | Bklyn |
| 54 | Barbara Debate | 0 | Daughter | — | Bklyn |
| 55 | Frank Smith | 61 | Head | Elevator | New Jersey |
| 56 | Virginia Smith | 62 | Wife | — | N.Y.C. |
| 57 | Patrick Mccocker | 40 | Head | Manager | Ireland |
| 58 | Elizabeth Mccocker | 40 | Wife | — | Ireland |
| 59 | Myles Mccocker | 12 | Son | — | Bklyn |
| 60 | Catherine Mccocker | 10 | Daughter | — | Bklyn |
| 61 | James Mccocker | 9 | Son | — | Bklyn |
| 62 | Kevin Mccocker | 5 | Son | — | Bklyn |
| 63 | Margaret Mccocker | 4 | Daughter | — | Bklyn |
| 64 | William Grace | 39 | Head | Chauffeur | Ireland |
| 65 | Mary Grace THIS PERSON | 42 | Wife | — | Ireland |
| 66 | Mary Grace | 9 | Daughter | — | Bklyn |
| 67 | Katherine Grace | 8 | Daughter | — | Bklyn |
| 68 | William Grace | 6 | Son | — | Bklyn |
| 69 | Margaret Grace | 4 | Daughter | — | Bklyn |
| 70 | Patricia Grace | 2 | Daughter | — | Bklyn |
| 71 | James Grace | 1 | Son | — | Bklyn |
| 72 | Joseph Parker | 58 | Head | Watchman | England |
| 73 | Mary Parker | 39 | Wife | — | Bklyn |
| 74 | Mary E. Parker | 27 | Daughter | Laundry | Bklyn |
| 75 | Edward Parker | 8 | Son | — | Bklyn |
| 76 | Joseph Curran | 32 | Head | Boats | Bklyn |
| 77 | Louise Curran | 30 | Wife | — | Bklyn |
| 78 | Joseph Curran | 9 | Son | — | Bklyn |
| 79 | Joan Curran | 7 | Daughter | — | Bklyn |
| 80 | William Curran | 5 | Son | — | Bklyn |
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)