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Maria Lopez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Imperial-County, California
Our Model Tree links this Maria Lopez across the 1930 and 1940 US Censuses in Imperial-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 11-person household.
Age 11
b. ~1929
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Imperial-County, California |
| Surname | Lopez |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Brawley City |
| 1935 Residence (County) | Imperial |
| Additional Details | |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Brawley City |
| 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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Maria | Age | Birth yr |
|---|---|---|---|---|
| Tonie Lopez | Daughter | — | 3 | ~1937 |
| Jose Lopez | Son | — | 14 | ~1926 |
| Joaquin Lopez | Son | — | 5 | ~1935 |
| Luis Lopez | Son | — | 4 | ~1936 |
| Cindy Lopez | Spouse | — | 37 | ~1903 |
| Maria Lopez | Daughter | — | 11 | ~1929 |
| Rafael Lopez | Daughter | — | 5 | ~1935 |
| Jose Lopez | Head | — | 38 | ~1902 |
| Carlos Lopez | Son | — | 13 | ~1927 |
| Ramiro Lopez | Son | — | 10 | ~1930 |
| Virginia Lopez | Daughter | — | 8 | ~1932 |
Census Appearances
1930
Imperial, California
Daughter, age 1
Imperial, California · implied b. ~1929 — 34 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lopez |
| Given Name | Maria T. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Mexican |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Mexico |
| Occupation | none |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Imperial-County, California
Daughter, age 11
Imperial-County, California · implied b. ~1929 — 11 household members
| Surname | Lopez |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Brawley City |
| 1935 Residence (County) | Imperial |
| Highest Grade | No 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 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
★ You are viewing this record
Sibling
Luis Lopez
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carlos Lopez
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ramiro Lopez
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Lopez
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jose Lopez
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Tonie Lopez
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rafael Lopez
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joaquin Lopez
Sibling · 1940 · age 5
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 — Imperial-County, California
Open full size
1940 US Federal Census — Imperial-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00210-00251)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Basilio Nicacio | 52 | Head | Farm Labor | Mexico |
| 42 | Teodora Nicacio | 41 | Wife | — | Mexico |
| 43 | Marcelino Nicacio | 24 | Son | Farm Labor | Texas |
| 44 | Pedro Nicacio | 22 | Son | Farm Labor | Texas |
| 45 | Carmel Nicacio | 21 | Daughter | — | Texas |
| 46 | David Nicacio | 20 | Son | Farm Labor | Texas |
| 47 | Catalina Nicacio | 14 | Daughter | — | California |
| 48 | Paula Nicacio | 12 | Daughter | — | California |
| 49 | Felipe Nicacio | 8 | Son | — | California |
| 50 | Frank Nicacio | 6 | Son | — | California |
| 51 | Juan Nicacio | 39 | Son | Farm Labor | Mexico |
| 52 | Pilar Nicacio | 31 | Daughter-in-law | — | Mexico |
| 53 | Antonio Nicacio | 30 | Son | Farm Labor | Mexico |
| 54 | Amparo Nicacio | 25 | Daughter-in-law | — | Mexico |
| 55 | Elvira Nicacio | 1 | Granddaughter | — | California |
| 56 | Elisa Nicacio | 1 | Granddaughter | — | California |
| 57 | Maurilio Gonzales | 34 | Son-in-law | Farm Labor | Mexico |
| 58 | Josefina Gonzales | 28 | Daughter | — | Mexico |
| 59 | Alfredo Gonzales | 5 | Grandson | — | Mexico |
| 60 | Alberto Gonzales | 2 | Grandson | — | California |
| 61 | Lionar Gonzales | 0 | Granddaughter | — | California |
| 62 | Florentino Serena | 42 | Head | Farm Labor | Mexico |
| 63 | Marcelina Serena | 35 | Wife | — | Mexico |
| 64 | David Serena | 14 | Son | — | California |
| 65 | Carmen Serena | 10 | Son | — | California |
| 66 | Angelina Serena | 9 | Daughter | — | California |
| 67 | Rosa Serena | 8 | Daughter | — | California |
| 68 | Juanita Serena | 5 | Daughter | — | California |
| 69 | Alfonso Serena | 2 | Son | — | California |
| 70 | Jose Lopez | 38 | Head | Farm Labor | Mexico |
| 71 | Cindy Lopez | 37 | Wife | — | Mexico |
| 72 | Jose Lopez | 14 | Son | — | California |
| 73 | Carlos Lopez | 13 | Son | — | California |
| 74 | Maria Lopez THIS PERSON | 11 | Daughter | — | California |
| 75 | Ramiro Lopez | 10 | Son | — | California |
| 76 | Virginia Lopez | 8 | Daughter | — | California |
| 77 | Rafael Lopez | 5 | Daughter | — | California |
| 78 | Luis Lopez | 4 | Son | — | California |
| 79 | Joaquin Lopez | 5 | Son | — | California |
| 80 | Tonie Lopez | 3 | Daughter | — | California |
Related Census Records
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)