ML
Maria Lopez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Las-Animas-County, Colorado
Our Model Tree links this Maria Lopez across the 1930 and 1940 US Censuses in Las-Animas-County, Colorado (XGBoost, ~Confirmed) — first a daughter (b.~1931), then head of a 9-person household.
Age 9
b. ~1931
Female
Daughter
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Las-Animas-County, Colorado |
| Surname | Lopez |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Vigil, Colo |
| 1935 Residence (County) | Las Animas |
| Additional Details | |
| Industry | S |
| Highest Grade | S 2 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Vigil Colo |
| Est. Birth Year | ~1931 |
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 |
|---|---|---|---|---|
| Priscilla Lopez | Daughter | — | 1 | ~1939 |
| Dora Lopez | Daughter | — | 12 | ~1928 |
| Adela Lopez | Daughter | — | 5 | ~1935 |
| Richard Lopez | Son | — | 7 | ~1933 |
| Pablo Lopez | Head | — | 35 | ~1905 |
| Ernest Lopez | Son | — | 3 | ~1937 |
| Maria Lopez | Daughter | — | 9 | ~1931 |
| Lucinda Lopez | Spouse | — | 32 | ~1908 |
| John Lopez | Son | — | 13 | ~1927 |
Census Appearances
1930
Las Animas, …
Daughter, age
Las Animas, Colorado · implied b. ~1930 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lopez |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | New Mexico |
| Mother's Birthplace | New Mexico |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Las-Animas-County, Colorado
Daughter, age 9
Las-Animas-County, Colorado · implied b. ~1931 — 9 household members
| Surname | Lopez |
| Given Name | Maria |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Vigil, Colo |
| 1935 Residence (County) | Las Animas |
| Industry | S |
| Highest Grade | S 2 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 9 · b. ~1931 · Colorado
★ You are viewing this record
Sibling
Adela Lopez
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Lopez
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Priscilla Lopez
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernest Lopez
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dora Lopez
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Lopez
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 — Las-Animas-County, Colorado
Open full size
1940 US Federal Census — Las-Animas-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00468-00048)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary Paiz | 44 | Wife | — | Colorado |
| 42 | Filiberto Paiz | 16 | Son | Laborer | Colorado |
| 43 | Encarnacion Paiz | 13 | Daughter | — | Colorado |
| 44 | Eliseo Paiz | 10 | Son | — | Colorado |
| 45 | Florence Paiz | 9 | Daughter | — | Colorado |
| 46 | Patricio Paiz | 5 | Son | — | Colorado |
| 47 | Juan Paiz | 3 | Son | — | Colorado |
| 48 | Elias Beherra|Beherra | 56 | Head | — | New Mexico |
| 49 | Charlotte Beherra|Beherra | 47 | Wife | — | New Mexico |
| 50 | Petrita Beherra|Beherra | 18 | Daughter | — | New Mexico |
| 51 | Rebecca Beherra|Beherra | 16 | Daughter | — | New Mexico |
| 52 | Leo Beherra|Beherra | 12 | Son | — | New Mexico |
| 53 | Angelina Beherra|Beherra | 10 | Daughter | — | New Mexico |
| 54 | Christopher Beherra|Beherra | 8 | Son | — | New Mexico |
| 55 | Pablo Lopez | 35 | Head | Wpa | New Mexico |
| 56 | Lucinda Lopez | 32 | Wife | — | New Mexico |
| 57 | John Lopez | 13 | Son | — | New Mexico |
| 58 | Dora Lopez | 12 | Daughter | — | Colorado |
| 59 | Maria Lopez THIS PERSON | 9 | Daughter | — | Colorado |
| 60 | Richard Lopez | 7 | Son | — | Colorado |
| 61 | Adela Lopez | 5 | Daughter | — | Colorado |
| 62 | Ernest Lopez | 3 | Son | — | Colorado |
| 63 | Priscilla Lopez | 1 | Daughter | — | Colorado |
| 64 | Isabel Martinez | 52 | Head | — | New Mexico |
| 65 | Juan Martinez | 27 | Head | Laborer | New Mexico |
| 66 | Viviana Martinez | 25 | Wife | — | New Mexico |
| 67 | Apolonio Zamora | 38 | Head | Wpa | Colorado |
| 68 | Leonor Zamora | 32 | Wife | — | Colorado |
| 69 | Rosalda Zamora | 17 | Daughter | — | Colorado |
| 70 | Florinda Zamora | 15 | Daughter | — | Colorado |
| 71 | Emilio Zamora | 13 | Son | — | Colorado |
| 72 | Teresa Zamora | 11 | Daughter | — | Colorado |
| 73 | Ana Zamora | 8 | Daughter | — | Colorado |
| 74 | Ellay Zamora | 6 | Son | — | Colorado |
| 75 | Pedro Zamora | 33 | Head | Wpa | Colorado |
| 76 | Rosalia Zamora | 27 | Wife | — | Colorado |
| 77 | Julian Zamora | 12 | Son | — | Colorado |
| 78 | Martha Zamora | 7 | Daughter | — | Colorado |
| 79 | Ida Zamora | 2 | Daughter | — | Colorado |
| 80 | Jessie Zamora | 0 | Daughter | — | Colorado |
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)