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Mary Lopez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Pima-County, Arizona
Our Model Tree links this Mary Lopez across the 1930 and 1940 US Censuses in Pima-County, Arizona (XGBoost, ~Confirmed) — first a daughter (b.~1908), then head of a 7-person household.
Age 32
b. ~1908
Female
Daughter
Born: Arizona
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Pima-County, Arizona |
| Surname | Lopez |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | American Indian |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Arizona |
| 1935 Residence (City) | COWLIC VILLAGE |
| 1935 Residence (County) | PIMA |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
| Township / Ward | Cowlic Village |
| Est. Birth Year | ~1908 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Vincent Phill | Son | — | 18 | ~1922 |
| Louise Phill | Daughter | — | 26 | ~1914 |
| Angelita Phill | Daughter | — | 28 | ~1912 |
| Rose Phill | Spouse | — | 55 | ~1885 |
| Jose Phill | Head | — | 55 | ~1885 |
| Mary Lopez | Daughter | — | 32 | ~1908 |
| Andrew Lopez | Other | — | 38 | ~1902 |
Census Appearances
1930
Pima, Arizona
Spouse, age 22
Pima, Arizona · implied b. ~1908 — 41 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lopez |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Mexican |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Arizona |
| Age at First Marriage | 21 |
| Father's Birthplace | Sonora Mex |
| Mother's Birthplace | Arizona |
| Can Read/Write | Yes |
| Birth State | Arizona |
| Birth Country | United States |
| Birthplace (normalized) | arizona |
1940
Pima-County, Arizona
Daughter, age 32
Pima-County, Arizona · implied b. ~1908 — 7 household members
| Surname | Lopez |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | American Indian |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Arizona |
| 1935 Residence (City) | COWLIC VILLAGE |
| 1935 Residence (County) | PIMA |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| 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 Mary Lopez across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Lopez
Daughter · 1940 · age 32 · b. ~1908 · Arizona
★ You are viewing this record
Sibling
Angelita Phill
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louise Phill
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vincent Phill
Sibling · 1940 · age 18
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
39 people indexed on this census page (nara:1940:m-t0627-00112-01089)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Moreno Helen Moreno | 20 | Daughter | — | Arizona |
| 2 | Wilson Louise Moreno | 20 | Sister-in-law | — | — |
| 3 | Jose Lopez | 45 | Head | Laborer | Arizona |
| 4 | Louise Lopez | 45 | Wife | — | Arizona |
| 5 | Pancho Lopez | 25 | Son | Laborer | Arizona |
| 6 | Cecelia Lopez | 17 | Daughter | — | Arizona |
| 7 | Clara Lopez | 15 | Daughter | — | Arizona |
| 8 | Jose Lopez | 8 | Son | — | Arizona |
| 9 | Ramon Pancho | 50 | Head | Laborer | Arizona |
| 10 | Helen Pancho | 45 | Wife | — | Arizona |
| 11 | Albert Pancho | 7 | Son | — | Arizona |
| 12 | Patrico Pancho | 4 | Son | — | Arizona |
| 13 | Frances Pancho | 2 | Daughter | — | Arizona |
| 14 | Francisco Antone Pancho | 13 | Step-son | — | Arizona |
| 15 | Jose Juan | 48 | Head | Laborer | Arizona |
| 16 | Chica Juan | 80 | Mother | — | Arizona |
| 17 | Francisco Pancho | 73 | Head | Farmer | Arizona |
| 18 | Rose Pancho | 32 | Daughter | — | Arizona |
| 19 | Ramon Pancho | 37 | Son | Laborer | Arizona |
| 20 | Anita Pancho | 29 | Daughter-in-law | — | Arizona |
| 21 | Margaret Pancho | 2 | Granddaughter | — | Arizona |
| 22 | Thomas Pancho | 0 | Grandson | — | Arizona |
| 23 | Regudio Valisto | 34 | Grandson | — | Arizona |
| 24 | Lupe Valisto | 28 | Granddaughter | — | Arizona |
| 25 | Milsi Louis | 30 | Granddaughter | — | Arizona |
| 26 | Cecelia Louis | 8 | Great Granddaughter | — | Arizona |
| 27 | Isadora Louis | 6 | Great Granddaughter | — | Arizona |
| 28 | Juan Lopez | 75 | Head | Stockman | Arizona |
| 29 | Lupe Lopez | 27 | Daughter | — | Arizona |
| 30 | Paul Lopez | 17 | Son | Laborer | Arizona |
| 31 | Jeffrey Juan | 30 | Uncle | Laborer | Arizona |
| 32 | Joseph Enos | 7 | Grandson | — | Arizona |
| 33 | Jose Phill | 55 | Head | Stockman | Arizona |
| 34 | Rose Phill | 55 | Wife | — | Arizona |
| 35 | Vincent Phill | 18 | Son | — | Arizona |
| 36 | Angelita Phill | 28 | Daughter | — | Arizona |
| 37 | Louise Phill | 26 | Daughter | — | Arizona |
| 38 | Andrew Lopez | 38 | Son-in-law | Stockman | Arizona |
| 39 | Mary Lopez THIS PERSON | 32 | Daughter | — | 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)