MP
Mary Perry — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Alameda-County, California
Our Model Tree links this Mary Perry across the 1920, 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a head (b.~1861), then head of a 6-person household.
Age 79
b. ~1861
Female
Head
Born: Portugal
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Perry |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 79 |
| Marital Status | Widowed |
| Birthplace | Portugal |
| 1935 Residence (City) | Oakland City |
| 1935 Residence (County) | Alameda |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | 2 |
| 1935 Residence | Same place |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
| Township / Ward | Oakland City |
| Est. Birth Year | ~1861 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Shirley Perry | Daughter | — | 4 | ~1936 |
| Josie Perry | Daughter | — | 43 | ~1897 |
| Mary Perry | Head | — | 79 | ~1861 |
| Margaret Perry | Other | — | 33 | ~1907 |
| Frank Perry | Son | — | 40 | ~1900 |
| Alfred Perry | Son | — | 37 | ~1903 |
Census Appearances
1920
Alameda, California
Other, age 58
Alameda, California · implied b. ~1862 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Perry |
| Given Name | Mary |
| Relationship to Head | mother-in-law |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Widowed |
| Birthplace | Portugal |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | none |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1930
Alameda, California
Other, age 69
Alameda, California · implied b. ~1861 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Perry |
| Given Name | Mary J. |
| Relationship to Head | Mother |
| Sex | F |
| Color / Race | White |
| Age | 69 |
| Marital Status | Widowed |
| Birthplace | Portugal |
| Naturalization Status | Alien |
| Year of Immigration | 1880 |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Can Read/Write | Yes |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1940
Alameda-County, California
Head, age 79
Alameda-County, California · implied b. ~1861 — 6 household members
| Surname | Perry |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 79 |
| Marital Status | Widowed |
| Birthplace | Portugal |
| 1935 Residence (City) | Oakland City |
| 1935 Residence (County) | Alameda |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Highest Grade | 2 |
| 1935 Residence | Same place |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
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 Perry 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 Perry
Head · 1940 · age 79 · b. ~1861 · California
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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 — Alameda-County, California
Open full size
1940 US Federal Census — Alameda-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00433-00725)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Meyer | 56 | Head | Farmer | New York |
| 2 | Mary Ellen Meyer | 55 | Wife | — | New York |
| 3 | William Meyer | 22 | Son | Trucking | Connecticut |
| 4 | Marie Meyer | 17 | Daughter | — | California |
| 5 | Louis Meyer | 27 | Son | Warehouseman | New York |
| 6 | Elsie Meyer | 27 | Daughter | — | California |
| 7 | Mary Ellen Meyer | 12 | Daughter | — | California |
| 8 | Helen Becher | 35 | Head | Detective | California |
| 9 | Beverly Becher | 15 | Daughter | — | California |
| 10 | Robert Becher | 13 | Son | — | California |
| 11 | Frances Killian | 58 | Mother | — | California |
| 12 | Peter W Kniper | 59 | Head | Carpenter | Iowa |
| 13 | Margaret Kniper | 59 | Wife | — | Scotland |
| 14 | James M Kniper | 25 | Son | Traffic Dept | California |
| 15 | Charles Martin | 47 | Boarder | Steward Dept | California |
| 16 | Mary Perry THIS PERSON | 79 | Head | — | Portugal |
| 17 | Frank Perry | 40 | Son | Cabinet Maker | California |
| 18 | Josie Perry | 43 | Daughter | — | California |
| 19 | Alfred Perry | 37 | Son | Foreman | California |
| 20 | Margaret Perry | 33 | Daughter in law | Spinner | California |
| 21 | Shirley Perry | 4 | Daughter | — | California |
| 22 | Mary Hawkins | 55 | Head | Practical Nurse | Ireland |
| 23 | James Simmons | 50 | Head | Steam Fitter | California |
| 24 | Nellie Simmons | 39 | Wife | — | California |
| 25 | Nellie Mae Simmons | 15 | Daughter | — | California |
| 26 | James Matheney | 52 | Head | Carpenter | Iowa |
| 27 | Belle Matheney | 52 | Wife | — | Kansas |
| 28 | Marjorie Matheney | 17 | Daughter | — | Nebraska |
| 29 | James Matheney | 10 | Son | — | California |
| 30 | Pauline Wale | 25 | Daughter | Clerk | Nebraska |
| 31 | James Lee Wale | 6 | Grandson | — | California |
| 32 | Florence Macedo | 62 | Head | — | Portugal |
| 33 | Filomena Macedo | 48 | Wife | Floor Lady | California |
| 34 | Richard Macedo | 19 | Son | — | California |
| 35 | Antony Macedo | 15 | Son | — | California |
| 36 | Lorraine Macedo | 19 | Daughter | Cannery | California |
| 37 | Walter Macedo | 21 | Son | Cabinet Maker | California |
| 38 | Raymond Macedo | 23 | Son | Cabinet Maker | California |
| 39 | Marie Macedo | 18 | Daughter in law | — | California |
| 40 | Ronald Macedo | 1 | Grandson | — | California |
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)