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Maria Lopez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this Maria Lopez across the 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 12-person household.
Age 11
b. ~1929
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Lopez |
| Given Name | Maria de Jesus |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | City Los Angeles |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | City Los Angeles |
| Est. Birth Year | ~1929 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Maria | Age | Birth yr |
|---|---|---|---|---|
| Ignacio Lopez | Son | — | 3 | ~1937 |
| Maria Lopez | Daughter | — | 5 | ~1935 |
| Isabel Lopez | Daughter | — | 14 | ~1926 |
| Elvira Lopez | Daughter | — | 9 | ~1931 |
| Jesus Lopez | Head | — | 41 | ~1899 |
| Esther Lopez | Daughter | — | 16 | ~1924 |
| Josephine Lopez | Daughter | — | 15 | ~1925 |
| Arturo Lopez | Son | — | 2 | ~1938 |
| Apolinar Lopez | Son | — | 18 | ~1922 |
| Ernesto Lopez | Son | — | 8 | ~1932 |
| Maria Lopez | Daughter | — | 11 | ~1929 |
| Elena Lopez | Other | — | 41 | ~1899 |
Census Appearances
1930
Los Angeles, …
Daughter, age 1
Los Angeles, California · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lopez |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Mexican |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Mexico |
| Can Read/Write | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Daughter, age 11
Los-Angeles-County, California · implied b. ~1929 — 12 household members
| Surname | Lopez |
| Given Name | Maria de Jesus |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | City Los Angeles |
| 1935 Residence (County) | Los Angeles |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Highest Grade | No 4 |
| 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 Lopez across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Maria Lopez
Daughter · 1940 · age 11 · b. ~1929 · California
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Sibling
Ignacio Lopez
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabel Lopez
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arturo Lopez
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Esther Lopez
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elvira Lopez
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Lopez
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maria Lopez
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Apolinar Lopez
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernesto Lopez
Sibling · 1940 · age 8
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 — Los-Angeles-County, California
Open full size
1940 US Federal Census — Los-Angeles-County, California
Page Contents
29 people indexed on this census page (nara:1940:m-t0627-00384-00227)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dora Tishinoff | 62 | Wife | Migratory | Russia |
| 42 | Meleio Ybarra | 56 | Head | Migratory | Mexico |
| 43 | Jesus Ybarra | 42 | Wife | — | Mexico |
| 44 | Justo Ybarra | 13 | Son | — | California |
| 45 | Juan Ybarra | 8 | Son | — | California |
| 46 | Margarita Ybarra | 5 | Daughter | — | California |
| 47 | Antonio Ybarra | 2 | Son | — | California |
| 48 | Isabel Andrade | 50 | Head | Barber | Mexico |
| 49 | Luis Magana | 25 | Head | Barber | New Mexico |
| 50 | Lula Magana | 57 | Mother | — | Mexico |
| 51 | Jesus Lopez | 41 | Head | Laborer | Mexico |
| 52 | Elena Lopez | 41 | Mother | — | Mexico |
| 53 | Apolinar Lopez | 18 | Son | Meat Cutter | Mexico |
| 54 | Esther Lopez | 16 | Daughter | — | Mexico |
| 55 | Josephine Lopez | 15 | Daughter | — | Arizona |
| 56 | Isabel Lopez | 14 | Daughter | — | Arizona |
| 57 | Maria De Jesus Lopez THIS PERSON | 11 | Daughter | — | California |
| 58 | Elvira Lopez | 9 | Daughter | — | California |
| 59 | Ernesto Lopez | 8 | Son | — | California |
| 60 | Maria Elena Lopez | 5 | Daughter | — | California |
| 61 | Ignacio Lopez | 3 | Son | — | California |
| 62 | Arturo Lopez | 2 | Son | — | California |
| 63 | Paul Manrique | 36 | Head | Truck Driver | Mexico |
| 64 | Frances Manrique | 31 | Wife | — | Mexico |
| 65 | Margaret Manrique | 17 | Daughter | — | California |
| 66 | Arthur Manrique | 15 | Son | — | California |
| 67 | Richard Manrique | 14 | Son | — | California |
| 68 | William H Ralston | 46 | Head | Paving Work | Nebraska |
| 69 | Minnie D Ralston | 40 | Wife | — | Nebraska |
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)