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Maria Hernandez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Alameda-County, California
Our Model Tree links this Maria Hernandez across the 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 6-person household.
Age 19
b. ~1921
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Hernandez |
| Given Name | Maria |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Decoto |
| 1935 Residence (County) | Alameda |
| Additional Details | |
| Occupation | canner |
| Industry | cannery |
| Class of Worker | PW |
| Hours Worked | 23 |
| Income (1939) | 273 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Canner |
| Township / Ward | Decoto |
| Est. Birth Year | ~1921 |
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 Maria | Age | Birth yr |
|---|---|---|---|---|
| Delfin Hernandez | Son | — | 11 | ~1929 |
| Mercedes Hernandez | Daughter | — | 1 | ~1939 |
| Esmeralda Hernandez | Spouse | — | 43 | ~1897 |
| Ricarda Hernandez | Daughter | — | 17 | ~1923 |
| Dionisio Hernandez | Head | — | 56 | ~1884 |
| Maria Hernandez | Daughter | — | 19 | ~1921 |
Census Appearances
1930
Alameda, California
Daughter, age 8
Alameda, California · implied b. ~1922 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hernandez |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Spain |
| Mother's Birthplace | Spain |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Alameda-County, California
Daughter, age 19
Alameda-County, California · implied b. ~1921 — 6 household members
| Surname | Hernandez |
| Given Name | Maria |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Decoto |
| 1935 Residence (County) | Alameda |
| Occupation | canner |
| Industry | cannery |
| Class of Worker | PW |
| Hours Worked | 23 |
| Income (1939) | 273 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Maria Hernandez across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Maria Hernandez
Daughter · 1940 · age 19 · b. ~1921 · California
★ You are viewing this record
Sibling
Mercedes Hernandez
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Delfin Hernandez
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ricarda Hernandez
Sibling · 1940 · age 17
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 — 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-t0627-00191-00513)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Manuel Monte | 20 | Son | Labor Ccc | California |
| 2 | Isabel Monte | 17 | daughter | — | California |
| 3 | Barbara Monte | 14 | daughter | — | California |
| 4 | Maria Monte | 13 | daughter | — | California |
| 5 | Frances Monte | 10 | daughter | — | California |
| 6 | Elmer Peixotto | 26 | Head | Laborer | California |
| 7 | Vivian Peixotto | 23 | Wife | — | California |
| 8 | Sandra Peixotto | 1 | daughter | — | California |
| 9 | Ettore Caminada | 58 | Head | — | Italy |
| 10 | Angelina Caminada | 57 | Wife | — | Italy |
| 11 | Rinaldo Caminada | 23 | Son | Banker | California |
| 12 | Lydia Caminada | 16 | daughter | — | California |
| 13 | Rudoff Caminada | 17 | nephew | Baker Helper | California |
| 14 | Alfonso Ortega | 32 | Head | Laborer | Spain |
| 15 | Suzy Ortega | 33 | Wife | — | Spain |
| 16 | Manuel Garcia Ramos | 50 | Head | Laborer | Spain |
| 17 | Gloria Garcia Ramos | 47 | Wife | — | Spain |
| 18 | John Garcia Ramos | 18 | son | Laborer | California |
| 19 | Manuel Garcia Ramos | 13 | son | — | California |
| 20 | Peter Acosta | 29 | Head | Laborer | California |
| 21 | Amalia Acosta | 32 | Wife | — | Mexico |
| 22 | Lupe Acosta | 13 | daughter | — | Arizona |
| 23 | Margaret Acosta | 5 | daughter | — | Arizona |
| 24 | Thomas Pagan | 23 | Head | Laborer | California |
| 25 | Margaret Pagan | 24 | Wife | — | California |
| 26 | Lorraine Pagan | 3 | daughter | — | California |
| 27 | Manuel Muniz | 43 | Head | Truck Driver | California |
| 28 | Madeline Muniz | 36 | Wife | — | California |
| 29 | Dionisio Hernandez | 56 | Head | — | Spain |
| 30 | Esmeralda Hernandez | 43 | Wife | — | Spain |
| 31 | Maria Hernandez THIS PERSON | 19 | daughter | Canner | California |
| 32 | Ricarda Hernandez | 17 | daughter | Sorter | California |
| 33 | Delfin Hernandez | 11 | son | — | California |
| 34 | Mercedes Hernandez | 1 | daughter | — | California |
| 35 | Luis Castillo | 48 | Head | Laborer | Mexico |
| 36 | Leonora Castillo | 46 | Wife | — | Mexico |
| 37 | Amelia Castillo | 17 | daughter | Canner | California |
| 38 | Jose Fuentes | 39 | Head | Laborer | Mexico |
| 39 | Genoveva Fuentes | 29 | Wife | — | Mexico |
| 40 | Ricardo Eduardo Fuentes | 0 | Son | — | 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)