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Mary Muller — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Mary Muller across the 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 5-person household.
Age 14
b. ~1926
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Muller |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1926 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Virginia Muller | Daughter | — | 20 | ~1920 |
| Mary Muller | Daughter | — | 14 | ~1926 |
| Florence Muller | Head | — | 50 | ~1890 |
| Florence Muller | Daughter | — | 15 | ~1925 |
| Frederick Muller | Son | — | 17 | ~1923 |
Census Appearances
1930
San Francisco, …
Daughter, age 4
San Francisco, California · implied b. ~1926 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Muller |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | Mexico |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Daughter, age 14
San-Francisco-County, California · implied b. ~1926 — 5 household members
| Surname | Muller |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Class of Worker | 0 |
| Highest Grade | Hs 1 |
| 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 Muller across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Muller
Daughter · 1940 · age 14 · b. ~1926 · California
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Sibling
Frederick Muller
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Muller
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Florence Muller
Sibling · 1940 · age 15
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 — San-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
24 people indexed on this census page (nara:1940:m-t0627-00316-00422)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Gullberg | 48 | Head | Parcel Delivery | Oregon |
| 2 | Frederick Areso | 39 | Lodger | Attendant | Australia |
| 3 | Richard De Preedie | 62 | Head | Carpenter | Canada English |
| 4 | Emelita Lorenz | 64 | Head | — | California |
| 5 | Arthur Lorenz | 43 | Son | Laborer | California |
| 6 | Florence Muller | 50 | Head | — | Mexico |
| 7 | Virginia M Muller | 20 | Daughter | Packer | California |
| 8 | Frederick Muller | 17 | Son | Messenger | California |
| 9 | Florence Muller | 15 | Daughter | — | California |
| 10 | Mary Muller THIS PERSON | 14 | Daughter | — | California |
| 11 | Dexter Solomon | 51 | Head | Carpenter | Canada English |
| 12 | Florence Solomon | 42 | Wife | Relief Comptometer Operator | England |
| 13 | Richard Solomon | 16 | Son | — | California |
| 14 | Eleanor Solomon | 15 | Daughter | — | California |
| 15 | Olive Fuchs | 42 | Head | Mangle Feeder | Oregon |
| 16 | Edward E. Fuchs | 22 | Son | Junior Clerk | California |
| 17 | Cecil C. Fuchs | 21 | Son | — | California |
| 18 | Russell C. Harley | 36 | Son | Steamship | California |
| 19 | Walter A. Vellguth | 47 | Head | Candy Maker | Calif |
| 20 | Hazel Vellguth | 43 | Wife | — | Calif |
| 21 | Jeanne A. Vellguth | 12 | Daughter | — | Calif |
| 22 | Othelia Ernest Cooper | 62 | Head | Bookkeeper | England |
| 23 | Cecelia V. Mc Chun | 55 | Head | Box Making | California |
| 24 | Hattie A. Meyer | 69 | Head | — | Michigan |
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)