MW
Mary Walton — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Francisco, California
Our Model Tree links this Mary Walton across the 1930 and 1940 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 12-person household.
Age 1
b. ~1929
Female
Daughter
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Walton |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Can Read/Write | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1929 |
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.
12 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alfred Walton | Son | — | 3 | ~1927 |
| Lillian Walton | Daughter | — | 15 | ~1915 |
| Lawrence Walton | Son | — | 9 | ~1921 |
| Richard Walton | Son | — | 11 | ~1919 |
| James Walton | Son | — | 16 | ~1914 |
| Gwendoline Walton | Daughter | — | 17 | ~1913 |
| Erma Walton | Spouse | — | 40 | ~1890 |
| Vivian Walton | Daughter | — | 15 | ~1915 |
| Mary Walton | Daughter | — | 1 | ~1929 |
| John Walton | Son | — | 13 | ~1917 |
| Jim Walton | Head | — | 39 | ~1891 |
| Douglas Walton | Son | — | 6 | ~1924 |
Census Appearances
1930
San Francisco, …
Daughter, age 1
San Francisco, California · implied b. ~1929 — 12 household members
| Surname | Walton |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | Iowa |
| Can Read/Write | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Daughter, age 11
San-Francisco-County, California · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Walton |
| Given Name | Maryjane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Walton across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Walton
Daughter · 1930 · age 1 · b. ~1929 · California
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Sibling
James Walton
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Walton
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vivian Walton
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Walton
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Walton
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Douglas Walton
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Walton
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alfred Walton
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gwendoline Walton
Sibling · 1930 · age 17
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
1930 US Federal Census — San Francisco, California
Open full size
1930 US Federal Census — San Francisco, California
Page Contents
18 people indexed on this census page (ia:1930:californiacensus00reel197:0974)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur Albertson | 35 | Head | Laborer | Norway |
| 2 | Mary Albertson | 24 | Wife | — | Ohio |
| 3 | Leonar L. Bonkowsky | 26 | Head | Silk Spinner | Germany Prussia |
| 4 | Veronica Bonkowsky | 24 | Wife | — | German Bavaria |
| 5 | Erhardt Bonkowsky | 2 | Son | — | California |
| 6 | Bessie Bigbee | 51 | Head | — | California |
| 7 | Jim H. Walton | 39 | Head | Chauffeur | California |
| 8 | Erma A. Walton | 40 | Wife | — | Iowa |
| 9 | Gwendoline Walton | 17 | Daughter | Clerk | California |
| 10 | James C. Walton | 16 | Son | — | California |
| 11 | Lillian D. Walton | 15 | Daughter | — | California |
| 12 | Vivian M. Walton | 15 | Daughter | — | California |
| 13 | John S. Walton | 13 | Son | — | California |
| 14 | Richard A. Walton | 11 | Son | — | California |
| 15 | Lawrence E. Walton | 9 | Son | — | California |
| 16 | Douglas R. Walton | 6 | Son | — | California |
| 17 | Alfred E. Walton | 3 | Son | — | California |
| 18 | Mary J. Walton THIS PERSON | 1 | Daughter | — | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)