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Mary Merrill — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Ventura-County, California
Our Model Tree links this Mary Merrill across the 1930 and 1940 US Censuses in Ventura-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 7-person household.
Age 41
b. ~1899
Female
Spouse
Born: Mexico
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Ventura-County, California |
| Surname | Merrill |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Mexico |
| 1935 Residence (City) | Oxnard |
| 1935 Residence (County) | Ventura |
| Naturalization Status | Alien |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Mexico |
| Birthplace (normalized) | mexico |
| Township / Ward | Oxnard |
| Est. Birth Year | ~1899 |
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 |
|---|---|---|---|---|
| George Merrill | Son | — | 8 | ~1932 |
| Mary Merrill | Spouse | — | 41 | ~1899 |
| Fernando Merrill | Son | — | 15 | ~1925 |
| Robert Merrill | Head | — | 55 | ~1885 |
| Richard Merrill | Son | — | 19 | ~1921 |
| Samuel Merrill | Son | — | 13 | ~1927 |
| Marybelle Merrill | Daughter | — | 9 | ~1931 |
Census Appearances
1930
Ventura, California
Other, age 31
Ventura, California · implied b. ~1899 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Merrell |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | Mexican |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Mexico |
| Naturalization Status | Alien |
| Year of Immigration | 1905 |
| Age at First Marriage | 16 |
| Father's Birthplace | Mexico |
| Mother's Birthplace | Mexico |
| Can Read/Write | No |
| Mother Tongue | Mexican |
| Birth Country | Mexico |
| Birthplace (normalized) | mexico |
1940
Ventura-County, California
Spouse, age 41
Ventura-County, California · implied b. ~1899 — 7 household members
| Surname | Merrill |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Mexico |
| 1935 Residence (City) | Oxnard |
| 1935 Residence (County) | Ventura |
| Naturalization Status | Alien |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Mexico |
| Birthplace (normalized) | mexico |
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 Merrill across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Merrill
Spouse · 1940 · age 41 · b. ~1899 · 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 — Ventura-County, California
Open full size
1940 US Federal Census — Ventura-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00364-00076)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Katie Reyes | 7 | Daughter | — | California |
| 42 | Bernice Reyes | 5 | Daughter | — | California |
| 43 | Mike Lemos | 36 | Head | Foundry Man | Mexico |
| 44 | Dorothy Lemos | 39 | Wife | — | California |
| 45 | Conception Lemos | 13 | Daughter | — | California |
| 46 | Michael Lemos | 12 | Son | — | California |
| 47 | M. Ralph Lemos | 8 | Son | — | California |
| 48 | Rosaline Lemos | 3 | Son | — | California |
| 49 | Esther Lemos | 1 | Daughter | — | California |
| 50 | Mariana Velasco | 73 | Mother-in-law | — | California |
| 51 | Paul Venzuelo | 30 | Head | Rancho | California |
| 52 | Irene Venzuelo | 26 | Wife | — | California |
| 53 | Pauline Venzuelo | 6 | Daughter | — | California |
| 54 | Albert Venzuelo | 4 | Son | — | California |
| 55 | Martin Venzuelo | 3 | Son | — | California |
| 56 | Edward Venzuelo | 1 | Son | — | California |
| 57 | Charles Venzuelo | 23 | Brother | Rancho | California |
| 58 | K. James Merrill | 28 | Head | Transportation | California |
| 59 | Eva Merrill | 27 | Wife | — | California |
| 60 | James Merrill | 9 | Son | — | California |
| 61 | Jacqueline Merrill | 3 | Daughter | — | California |
| 62 | Frank Rowley | 25 | Head | 60 | Oregon |
| 63 | Mary Rowley | 23 | Wife | — | California |
| 64 | Steven Rowley | 0 | Son | — | California |
| 65 | Robert Merrill | 55 | Head | — | California |
| 66 | Mary Merrill THIS PERSON | 41 | Wife | — | Mexico |
| 67 | Richard Merrill | 19 | Son | Commercial Tr. | California |
| 68 | Fernando Merrill | 15 | Son | — | California |
| 69 | Samuel Merrill | 13 | Son | — | California |
| 70 | Marybelle Merrill | 9 | Daughter | — | California |
| 71 | George Merrill | 8 | Son | — | California |
| 72 | John Grajeda | 40 | Head | Commercial Tr | California |
| 73 | Robert Merrill | 22 | Head | Commercial Tr | California |
| 74 | Vera Merrill | 20 | Wife | — | California |
| 75 | Romolo Casperzas | 42 | Head | — | Mexico |
| 76 | Minnie Casperzas | 38 | Wife | — | California |
| 77 | Cecil Wantury | 33 | Head | 48 | Texas |
| 78 | Eva Wantury | 29 | Wife | — | — |
| 79 | Urbano Etchechury | 54 | Head | Helper | France |
| 80 | Marie Etchechury | 55 | Wife | Sheep Herder | France |
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)