MH
Maria Hernandez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Pima-County, Arizona
Our Model Tree links this Maria Hernandez across the 1930 and 1940 US Censuses in Pima-County, Arizona (XGBoost, ~Confirmed) — first a daughter (b.~1923), then head of a 9-person household.
Age 17
b. ~1923
Female
Daughter
Born: Arizona
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Pima-County, Arizona |
| Surname | Hernandez |
| Given Name | Maria Luisa |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Arizona |
| 1935 Residence (City) | Gila Bend |
| 1935 Residence (County) | Maricopa |
| Additional Details | |
| Occupation | Attendant |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 225 |
| Highest Grade | No 4-1 |
| 1935 Residence | Arizona |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
| Occupation | Attendant |
| Township / Ward | Unincorporated Place Ajo Mer Town |
| Est. Birth Year | ~1923 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Maria | Age | Birth yr |
|---|---|---|---|---|
| Grace Hernandez | Son | — | 13 | ~1927 |
| Carmen Hernandez | Daughter | — | 15 | ~1925 |
| Vicente Hernandez | Son | — | 6 | ~1934 |
| Juanita Hernandez | Daughter | — | 9 | ~1931 |
| Frances Hernandez | Daughter | — | 2 | ~1938 |
| Maria Hernandez | Daughter | — | 17 | ~1923 |
| Virginia Hernandez | Daughter | — | 10 | ~1930 |
| Gustavo Hernandez | Son | — | 5 | ~1935 |
| Josefina Hernandez | Head | — | 24 | ~1916 |
Census Appearances
1930
Pima, Arizona
Daughter, age 7
Pima, Arizona · implied b. ~1923 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hernandez |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Mexican |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Arizona |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Mexico |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
1940
Pima-County, Arizona
Daughter, age 17
Pima-County, Arizona · implied b. ~1923 — 9 household members
| Surname | Hernandez |
| Given Name | Maria Luisa |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Arizona |
| 1935 Residence (City) | Gila Bend |
| 1935 Residence (County) | Maricopa |
| Occupation | Attendant |
| Industry | Hospital |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 225 |
| Highest Grade | No 4-1 |
| 1935 Residence | Arizona |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
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 17 · b. ~1923 · Arizona
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Sibling
Gustavo Hernandez
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Juanita Hernandez
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Hernandez
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Hernandez
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vicente Hernandez
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carmen Hernandez
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Grace Hernandez
Sibling · 1940 · age 13
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 — Pima-County, Arizona
Open full size
1940 US Federal Census — Pima-County, Arizona
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00112-00928)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gloria Fay Jones | 3 | Daughter | — | Arizona |
| 42 | Reyes Gutierrez | 54 | Head | Laborer | Mexico |
| 43 | Jesus Gutierrez | 40 | Wife | — | Mexico |
| 44 | Reyes Jr. Gutierrez | 20 | Son | Laborer | Arizona |
| 45 | Rodolfo Gutierrez | 18 | Son | Laborer | Mexico |
| 46 | Ray F. Armenta | 35 | Head | Laborer | Arizona |
| 47 | Isabel Armenta | 64 | Mother | — | Mexico |
| 48 | Abraham Armenta | 40 | Brother | Homestead | Arizona |
| 49 | Francisco Armenta | 32 | Brother | — | Arizona |
| 50 | Josefa (X) Lex | 58 | Head | — | Mexico |
| 51 | Alfonso Lex | 22 | Son | Laborer | Arizona |
| 52 | Rumalda Lex | 15 | Stepdaughter | — | Arizona |
| 53 | Tomas Martinez | 33 | Head | Laborer | New Mexico |
| 54 | Lupe (X) Martinez | 33 | Wife | — | Mexico |
| 55 | Everts Martinez | 1 | Son | — | Arizona |
| 56 | Jake Maria Leon | 60 | Head | Laborer | Mexico |
| 57 | Agripina Leon | 43 | Wife | — | Mexico |
| 58 | Angelina Leon | 23 | Daughter | — | Mexico |
| 59 | Enriqueta Leon | 19 | Daughter | — | Arizona |
| 60 | Eldis Leon | 15 | Daughter | — | Arizona |
| 61 | Jose Maria Jr. Leon | 12 | Son | — | Arizona |
| 62 | Bartola Leon | 8 | Daughter | — | Arizona |
| 63 | Miller Manuel | 38 | Head | Laborer | Arizona |
| 64 | Bula (X) Manuel | 29 | Wife | — | Arizona |
| 65 | Verona Manuel | 5 | Daughter | — | Arizona |
| 66 | Miller Jr. Manuel | 3 | Son | — | Arizona |
| 67 | Lewis D. Nelson | 65 | Head | Receives Pension | Arizona |
| 68 | Helen (X) Nelson | 56 | Wife | — | Arizona |
| 69 | Josefina (X) Hernandez | 24 | Head | — | New Mexico |
| 70 | Maria Luisa Hernandez THIS PERSON | 17 | Daughter | Attendant | Arizona |
| 71 | Carmen Hernandez | 15 | Daughter | — | Arizona |
| 72 | Grace Hernandez | 13 | Son | — | Arizona |
| 73 | Virginia Hernandez | 10 | Daughter | — | Arizona |
| 74 | Juanita Hernandez | 9 | Daughter | — | Arizona |
| 75 | Vicente Hernandez | 6 | Son | — | Arizona |
| 76 | Gustavo Hernandez | 5 | Son | — | Arizona |
| 77 | Frances Hernandez | 2 | Daughter | — | Arizona |
| 78 | Mickey Thompson | 24 | Head | Laborer | Arizona |
| 79 | Edith (X) Thompson | 24 | Wife | — | California |
| 80 | Edmond Thompson | 3 | Son | — | Arizona |
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)