MP
Maria Perez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Contra-Costa-County, California
Our Model Tree links this Maria Perez across the 1920, 1930 and 1940 US Censuses in Contra-Costa-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1882), then head of a 3-person household.
Age 58
b. ~1882
Female
Spouse
Born: Spain
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Contra-Costa-County, California |
| Surname | Perez |
| Given Name | Maria |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Spain |
| 1935 Residence (City) | Cowell |
| 1935 Residence (County) | Contra Costa |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Same place |
| Birth Country | Spain |
| Birthplace (normalized) | spain |
| Township / Ward | Cowell |
| Est. Birth Year | ~1882 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Maria | Age | Birth yr |
|---|---|---|---|---|
| Angel Perez | Head | — | 57 | ~1883 |
| Maria Perez | Spouse | — | 58 | ~1882 |
| Clotilde Perez | Daughter | — | 24 | ~1916 |
Census Appearances
1920
Santa Clara, …
Spouse, age 38
Santa Clara, California · implied b. ~1882 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Perez |
| Given Name | Maria |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Spain |
| Year of Immigration | 1908 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Spain |
| Mother's Birthplace | Spain |
| Occupation | Housewife |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Mother Tongue | Spanish |
| Birth Country | Spain |
| Birthplace (normalized) | spain |
1930
Contra Costa, …
Spouse, age 48
Contra Costa, California · implied b. ~1882 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Perez |
| Given Name | Maria |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Mexican |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Spain |
| Age at First Marriage | W |
| Father's Birthplace | Spain |
| Mother's Birthplace | Spain |
| Can Read/Write | No |
| Mother Tongue | Spanish |
| Veteran | Al |
| Birth Country | Spain |
| Birthplace (normalized) | spain |
1940
Contra-Costa-County, California
Spouse, age 58
Contra-Costa-County, California · implied b. ~1882 — 3 household members
| Surname | Perez |
| Given Name | Maria |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Spain |
| 1935 Residence (City) | Cowell |
| 1935 Residence (County) | Contra Costa |
| Naturalization Status | Naturalized |
| Highest Grade | 4 |
| 1935 Residence | Same place |
| Birth Country | Spain |
| Birthplace (normalized) | spain |
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 Perez across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Maria Perez
Spouse · 1940 · age 58 · b. ~1882 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Contra-Costa-County, California
Open full size
1940 US Federal Census — Contra-Costa-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00195-00720)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John R Powers | 58 | head | Chemist | California |
| 2 | Hazel L Powers | 48 | wife | — | Massachusetts |
| 3 | Martha J Powers | 8 | daughter | — | California |
| 4 | James W Swanson | 50 | head | Mechanic | California |
| 5 | Buena N Swanson | 52 | wife | — | Montana |
| 6 | John W Swanson | 20 | son | Laborer | California |
| 7 | Adna R Brandenburg | 52 | head | Chemist | Germany |
| 8 | Mary B Brandenburg | 51 | wife | — | California |
| 9 | Alfred O Swain | 41 | head | Foreman | Michigan |
| 10 | May T Q Swain | 38 | wife | — | Washington |
| 11 | Betty R Swain | 21 | daughter | Nurse | California |
| 12 | Glenna L Swain | 18 | daughter | New Worker | California |
| 13 | Helmut H Kinnett | 34 | head | Laborer | South Dakota |
| 14 | Gladys E Kinnett | 30 | wife | — | Oklahoma |
| 15 | Donald E Kinnett | 7 | son | — | South Dakota |
| 16 | Lois L Kinnett | 5 | daughter | — | South Dakota |
| 17 | Roger J Faber | 57 | head | Oiler | France |
| 18 | Marie J Faber | 54 | wife | — | France |
| 19 | Marie L Faber | 28 | daughter | — | France |
| 20 | Percy A Mainas | 46 | head | Operator Sack Mach | California |
| 21 | Robert J Mainas | 15 | son | — | California |
| 22 | Andrew J A Sihv | 40 | head | Repair Man | Michigan |
| 23 | Edna T Sihv | 40 | wife | — | Oregon |
| 24 | Bernice Claire Sihv | 11 | step-daughter | — | Oregon |
| 25 | Angel Perez | 57 | head | Scale Man | Spain |
| 26 | Maria Perez THIS PERSON | 58 | wife | — | Spain |
| 27 | Clotilde Perez | 24 | daughter | Secretary-Telephone Op | Chile |
| 28 | Fred H Butler | 43 | head | Mill Foreman | Missouri |
| 29 | Hazel A Butler | 42 | wife | Canning | California |
| 30 | Frank H Silva | 29 | head | Packman | California |
| 31 | Josephine N Silva | 26 | wife | — | California |
| 32 | Joann M Silva | 5 | daughter | — | California |
| 33 | Joseph W Silva | 30 | brother | Blacksmith Helper | California |
| 34 | Charles G Kauffman | 39 | head | Kiln Foreman | Michigan |
| 35 | Christy L Kauffman | 39 | wife | — | Kansas |
| 36 | James Kauffman | 14 | son | — | Michigan |
| 37 | Henry Kauffman | 9 | son | — | California |
| 38 | Janet B Kauffman | 6 | daughter | — | California |
| 39 | Clarence W Canny | 40 | head | Farm Foreman | Arkansas |
| 40 | Ella P Canny | 41 | wife | — | Arkansas |
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)