MG
Mary Grady — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Westchester-County, New York
Our Model Tree links this Mary Grady across the 1930 and 1940 US Censuses in Westchester-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Westchester-County, New York |
| Surname | Grady |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | New Rochelle City |
| 1935 Residence (County) | Westchester |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | New Rochelle City |
| Est. Birth Year | ~1926 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| John Grady | Son | — | 9 | ~1931 |
| Maurice Grady | Son | — | 12 | ~1928 |
| Elaine Grady | Daughter | — | 15 | ~1925 |
| Mary Grady | Daughter | — | 14 | ~1926 |
| Patricia Grady | Daughter | — | 17 | ~1923 |
| Maurice Grady | Head | — | 42 | ~1898 |
| Katherine Grady | Spouse | — | 41 | ~1899 |
Census Appearances
1930
Westchester, New …
Daughter, age 5
Westchester, New York · implied b. ~1925 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grady |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Westchester-County, New …
Daughter, age 14
Westchester-County, New York · implied b. ~1926 — 7 household members
| Surname | Grady |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | New Rochelle City |
| 1935 Residence (County) | Westchester |
| Highest Grade | H-1 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Grady across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Grady
Daughter · 1940 · age 14 · b. ~1926 · New York
★ You are viewing this record
Sibling
Patricia Grady
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maurice Grady
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elaine Grady
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Grady
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Westchester-County, New York
Open full size
1940 US Federal Census — Westchester-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02809-00105)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Grady | 36 | Daughter | Bookkeeper | New York |
| 2 | Maurice W. Grady | 42 | Head | Lawyer | Massachusetts |
| 3 | Katherine Grady | 41 | Wife | Library | Massachusetts |
| 4 | Patricia Grady | 17 | Daughter | — | New York |
| 5 | Elaine Grady | 15 | Daughter | — | New York |
| 6 | Mary Grady THIS PERSON | 14 | Daughter | — | Massachusetts |
| 7 | Maurice Grady | 12 | Son | — | Massachusetts |
| 8 | John Grady | 9 | Son | — | New York |
| 9 | William E. Billery | 32 | Head | Contractor | Sweden |
| 10 | Elizabeth Billery | 30 | Wife | — | North Ireland |
| 11 | Patricia M. Billery | 4 | Daughter | — | New York |
| 12 | George R. Friend | 66 | Head | — | Pennsylvania |
| 13 | Alice O. Friend | 64 | Wife | — | Pennsylvania |
| 14 | Arthur Schoenherr | 4 | Son | — | New York |
| 15 | Gilbert O. Munchery | 31 | Head | Inspector | New York |
| 16 | Ruth Munchery | 29 | Wife | — | Pennsylvania |
| 17 | Ruth Munchery | 6 | Daughter | — | New York |
| 18 | Virginia Munchery | 2 | Daughter | — | New York |
| 19 | Peter Kane | 33 | Head | Salesman | New York |
| 20 | Mary Kane | 73 | Mother | — | Irish Free State |
| 21 | Katherine Reynolds | 76 | Aunt | — | Irish Free State |
| 22 | Frederick Siemerz | 41 | Head | Auto Mechanic | New York |
| 23 | Edna L. Siemerz | 38 | Wife | — | New York |
| 24 | Joan M. Siemerz | 10 | Daughter | — | New York |
| 25 | Frederick J. Siemerz | 5 | Son | — | New York |
| 26 | Charles W. Schoenherr | 34 | Head | Police Officer | New York |
| 27 | Ann S. Schoenherr | 34 | Wife | — | New York |
| 28 | Marie Anne Schoenherr | 8 | Daughter | — | New York |
| 29 | Charles Schoenherr | 5 | Son | — | New York |
| 30 | George O. Heintz | 29 | Head | Mail Carrier | New York |
| 31 | Ada Heintz | 26 | Wife | — | Ohio |
| 32 | Lee Heintz | 5 | Daughter | — | New York |
| 33 | Maude H. Kapp | 50 | Head | — | New York |
| 34 | Alfred P. Patterson | 26 | Son-in-law | Route Salesman | New York |
| 35 | Evelyn F. Patterson | 25 | Daughter | — | New York |
| 36 | Charles W. Fischer | 27 | Head | Manager Clerk | New York |
| 37 | Sarah A. Fischer | 29 | Wife | — | Scotland |
| 38 | Claire A. Fischer | 5 | Daughter | — | New York |
| 39 | James C. Hitchcock | 42 | Head | Police Officer | New Jersey |
| 40 | Anna M. Hitchcock | 46 | Wife | — | 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)