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Mary Alexander — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Alameda, California
Our Model Tree links this Mary Alexander across the 1920 and 1930 US Censuses in Alameda, California (XGBoost, ~Confirmed) — first a spouse (b.~1880), then head of a 13-person household.
Age 40
b. ~1880
Female
Spouse
Born: Portugal
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Alameda, California |
| Surname | Alexander |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Portugal |
| Year of Immigration | 1880 |
| Naturalization Status | Alien |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Additional Details | |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
| Township / Ward | Oakland City |
| Est. Birth Year | ~1880 |
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.
13 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Martha Alexander | Daughter | — | 17 | ~1903 |
| Irene Alexander | Daughter | — | 3 | ~1917 |
| Mary Alexander | Daughter | — | 1 | ~1919 |
| Adeline Alexander | Daughter | — | 16 | ~1904 |
| Rosalie Alexander | Daughter | — | 9 | ~1911 |
| Helen Alexander | Daughter | — | 5 | ~1915 |
| Joseph Alexander | Head | — | 44 | ~1876 |
| Georgia Alexander | Son | — | 7 | ~1913 |
| Antone Alexander | Son | — | 22 | ~1898 |
| William Alexander | Son | — | 14 | ~1906 |
| Albert Alexander | Son | — | 11 | ~1909 |
| Alfred Alexander | Son | — | 18 | ~1902 |
| Mary Alexander | Spouse | — | 40 | ~1880 |
Census Appearances
1920
Alameda, California
Spouse, age 40
Alameda, California · implied b. ~1880 — 13 household members
| Surname | Alexander |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Portugal |
| Year of Immigration | 1880 |
| Naturalization Status | Alien |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Portuguese |
| Birth Country | Portugal |
| Birthplace (normalized) | portugal |
1930
Contra Costa, …
Spouse, age 55
Contra Costa, California · implied b. ~1875 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | Marie |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Portugal |
| Naturalization Status | Alien |
| Year of Immigration | 1881 |
| Age at First Marriage | 33 |
| Father's Birthplace | Portugal |
| Mother's Birthplace | Portugal |
| Can Read/Write | Yes |
| Mother Tongue | Portuguese |
| Veteran | No |
| 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 Alexander across 2 US Census years (1920 and 1930) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Alexander
Spouse · 1920 · age 40 · b. ~1880 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Alameda, California
Open full size
1920 US Federal Census — Alameda, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu090unit:1042)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Minnie Sousa | 18 | Daughter | Builder | California |
| 52 | Annie Sousa | 15 | Daughter | None | California |
| 53 | Margaret Sousa | 13 | Daughter | None | California |
| 54 | Frank Sousa | 11 | Son | None | California |
| 55 | Evelyn Sousa | 9 | Daughter | None | California |
| 56 | Willie Sousa | 7 | Son | None | California |
| 57 | Madeline Sousa | 5 | Daughter | None | California |
| 58 | John Amaral | 30 | Head | Trucking | Hawaii |
| 59 | Nellie Amaral | 20 | Wife | None | California |
| 60 | Albert White | 48 | Head | Plumber | Vermont |
| 61 | Mary White | 40 | Wife | None | California |
| 62 | Albert White | 19 | Son | Machinist | California |
| 63 | Edward White | 18 | Son | Millhand | California |
| 64 | Everett White | 16 | Son | Machinist | California |
| 65 | Ethel White | 14 | Daughter | None | California |
| 66 | Zelda White | 8 | Daughter | None | California |
| 67 | Doris White | 4 | Daughter | None | California |
| 68 | Henry Linke | 33 | Head | Machinist | Russia|Poland |
| 69 | James Thomas | 23 | Head | Seaman | Greece |
| 70 | Mary Thomas | 29 | Wife | None | California |
| 71 | Edith Olsen | 31 | Head | Milliner | Wisconsin |
| 72 | Fred Dutcher | 30 | Head | Lumberman | California |
| 73 | Maybelle Dutcher | 28 | Wife | None | Canada |
| 74 | Sousanna Dutcher | 6 | Daughter | None | California |
| 75 | Urgalant Dutcher | 5 | Son | None | California |
| 76 | Frank Calhoun | 37 | Head | Chauffeur | California |
| 77 | May Calhoun | 35 | Wife | None | California |
| 78 | Delia A Fattore | 53 | Mother-in-law | None | Ireland |
| 79 | Walter J Moore | 50 | Head | Printer | California |
| 80 | Mary V Freitas | 60 | Head | Laborer | Portugal |
| 81 | Georgina Freitas | 19 | Daughter | Laborer | Hawaii |
| 82 | Joseph Alexander | 44 | Head | Machinist | Portugal |
| 83 | Mary Alexander THIS PERSON | 40 | Wife | None | Portugal |
| 84 | Antone Alexander | 22 | Son | Machinist | Hawaii |
| 85 | Alfred Alexander | 18 | Son | Machinist | Hawaii |
| 86 | Martha Alexander | 17 | Daughter | Spinner | Hawaii |
| 87 | Adeline Alexander | 16 | Daughter | None | Hawaii |
| 88 | William Alexander | 14 | Son | None | Hawaii |
| 89 | Albert Alexander | 11 | Son | None | Hawaii |
| 90 | Rosalie Alexander | 9 | Daughter | None | Hawaii |
| 91 | Georgia Alexander | 7 | Son | None | Hawaii |
| 92 | Helen Alexander | 5 | Daughter | None | Hawaii |
| 93 | Irene Alexander | 3 | Daughter | None | Hawaii |
| 94 | Mary M Alexander | 1 | Daughter | None | California |
| 95 | Manuel Perry | 35 | Head | Drayman | Portugal |
| 96 | Mary Perry | 32 | Wife | None | Portugal |
| 97 | Manuel Perry | 10 | Son | None | Hawaii |
| 98 | Daniel Perry | 9 | Son | None | California |
| 99 | Frank Perry | 6 | Son | None | California |
| 100 | Antone Machado | 28 | Boarder | Truckman | Hawaii |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)