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Maria Martinez — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Bernardino-County, California
Our Model Tree links this Maria Martinez across the 1920, 1930 and 1940 US Censuses in San-Bernardino-County, California (XGBoost, ~Confirmed) — first a head (b.~1873), then head of a 3-person household.
Age 67
b. ~1873
Female
Head
Born: Spain
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Bernardino-County, California |
| Surname | Martinez |
| Given Name | Maria A. |
| Relationship to Head | head |
| Sex | F |
| Color / Race | White |
| Age | 67 |
| Marital Status | Widowed |
| Birthplace | Spain |
| 1935 Residence (City) | Ontario |
| Naturalization Status | Alien |
| Additional Details | |
| Occupation | 0 |
| Industry | No |
| Highest Grade | No 8 |
| Birth Country | Spain |
| Birthplace (normalized) | spain |
| Occupation | 0 |
| Township / Ward | Ontario |
| Est. Birth Year | ~1873 |
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 |
|---|---|---|---|---|
| Antonia Ganchin | Daughter | — | 25 | ~1915 |
| Alonso Martinez | Son | — | 21 | ~1919 |
| Maria Martinez | Head | — | 67 | ~1873 |
Census Appearances
1920
San Bernardino, …
Head, age 44
San Bernardino, California · implied b. ~1876 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martinez |
| Given Name | Maria |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Widowed |
| Birthplace | Spain |
| Year of Immigration | 1906 |
| Naturalization Status | Alien |
| Father's Birthplace | Spain |
| Mother's Birthplace | Spain |
| Occupation | none |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Mother Tongue | Spanish |
| Home Owned/Rented | R |
| Birth Country | Spain |
| Birthplace (normalized) | spain |
1930
San Bernardino, …
Head, age 56
San Bernardino, California · implied b. ~1874 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martinez |
| Given Name | Maria |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | Spain |
| Naturalization Status | Alien |
| Year of Immigration | 1905 |
| Father's Birthplace | Spain |
| Mother's Birthplace | Spain |
| Can Read/Write | Yes |
| Mother Tongue | Spanish |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Birth Country | Spain |
| Birthplace (normalized) | spain |
1940
San-Bernardino-County, California
Head, age 67
San-Bernardino-County, California · implied b. ~1873 — 3 household members
| Surname | Martinez |
| Given Name | Maria A. |
| Relationship to Head | head |
| Sex | F |
| Color / Race | White |
| Age | 67 |
| Marital Status | Widowed |
| Birthplace | Spain |
| 1935 Residence (City) | Ontario |
| Naturalization Status | Alien |
| Occupation | 0 |
| Industry | No |
| Highest Grade | No 8 |
| 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 Martinez across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Maria Martinez
Head · 1940 · age 67 · b. ~1873 · California
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — San-Bernardino-County, California
Open full size
1940 US Federal Census — San-Bernardino-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00290-00321)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Paul G. Hershey | 25 | head | Truck Driver | California |
| 42 | Margaret E. Hershey | 23 | wife | Citrus Fruit Packer | Calif |
| 43 | Albert H. Renio | 23 | head | Trouble Shooter | Calif |
| 44 | Barbara B. Renio | 22 | wife | Messenger Girl | Calif |
| 45 | Norman E. Renio | 1 | son | — | Calif |
| 46 | Claude R. Miner | 25 | head | Asst. Theater Manager | Michigan |
| 47 | Mamie A. Miner | 22 | wife | 0 | Okla |
| 48 | Barbara Jean Miner | 5 | daughter | — | Calif |
| 49 | Ronald R. Miner | 1 | son | — | Calif |
| 50 | Wesley W. Woods | 34 | head | Manager | Indiana |
| 51 | Ida Woods | 29 | wife | 0 | Kansas |
| 52 | Harry R. Hageman | 58 | head | Truck Tire Maker | Penna |
| 53 | Anna H. Hageman | 61 | wife | 0 | Penna |
| 54 | William M. Mortensen | 39 | head | Plasterer | Wash |
| 55 | Killian Mortensen | 36 | wife | Housekeeping | Utah |
| 56 | Charles Mortensen | 16 | son | News Worker | Utah |
| 57 | Peter J. Hamilton | 76 | head | 7 | Indiana |
| 58 | Ella J. Hamilton | 73 | wife | 7 | Illinois |
| 59 | Dale E. Mcquatters | 53 | head | Salesman | Iowa |
| 60 | Maude B. Mcquatters | 55 | wife | 0 | Iowa |
| 61 | Danera J. Mcquatters | 25 | daughter | Stenographer | Iowa |
| 62 | Mary F. Gardner | 41 | head | Citrus Fruit Packer | Mo |
| 63 | William H. Eckles | 69 | step father | 7 | Illinois |
| 64 | Lulu M. Eckles | 58 | mother | 7 | Mo |
| 65 | William T. Wright | 34 | head | Mechanic | New Mexico |
| 66 | Bessie V. Wright | 32 | wife | 0 | Montana |
| 67 | Violet Joy Wright | 12 | daughter | — | California |
| 68 | Betty Ann Wright | 10 | daughter | — | California |
| 69 | Benjamin M. Swerdloff | 30 | head | Salesman | New York |
| 70 | Molly Swerdloff | 28 | wife | 0 | Penna |
| 71 | Arthur J. Swerdloff | 1 | son | — | Calif |
| 72 | Myrl James | 15 | servant | Maid Helper | Texas |
| 73 | Maria A. Martinez THIS PERSON | 67 | head | 0 | Spain |
| 74 | Alonso Martinez | 21 | son | Laborer | California |
| 75 | Antonia E. Ganchin | 25 | daughter | Citrus Fruit Packer | Spain |
| 76 | Nellie A. White | 72 | head | 0 | Illinois |
| 77 | Edward C. Breen | 55 | son-in-law | Salesman | Illinois |
| 78 | Ora M. Breen | 44 | daughter | Bookkeeper | Illinois |
| 79 | Julian H. Pratt | 68 | head | Carpenter | Missouri |
| 80 | Ollie Pratt | 68 | wife | 0 | Missouri |
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)