WM
William Muller — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Los-Angeles-County, California
Our Model Tree links this William Muller across the 1930 and 1940 US Censuses in Los-Angeles-County, California (XGBoost, ~Confirmed) — first a head (b.~1904), then head of a 5-person household.
Age 36
b. ~1904
Male
Head
Born: California
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Los-Angeles-County, California |
| Surname | Muller |
| Given Name | William R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | Long Beach City |
| 1935 Residence (County) | Los Angeles |
| Additional Details | |
| Occupation | Laborer |
| Industry | Clay Company |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 640 |
| Highest Grade | G-8 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Laborer |
| Township / Ward | Long Beach City |
| Est. Birth Year | ~1904 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| William Muller | Head | — | 36 | ~1904 |
| William Muller | Son | — | 11 | ~1929 |
| Theresa Muller | Spouse | — | 31 | ~1909 |
| Helen Muller | Daughter | — | 3 | ~1937 |
| Robert Muller | Son | — | 9 | ~1931 |
Census Appearances
1930
Los Angeles, …
Head, age 26
Los Angeles, California · implied b. ~1904 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Muller |
| Given Name | William R |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | California |
| Age at First Marriage | 23 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Illinois |
| Occupation | Salesman |
| Industry | Ship chandler |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 45 |
| Veteran | No |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Los-Angeles-County, California
Head, age 36
Los-Angeles-County, California · implied b. ~1904 — 5 household members
| Surname | Muller |
| Given Name | William R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | Long Beach City |
| 1935 Residence (County) | Los Angeles |
| Occupation | Laborer |
| Industry | Clay Company |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 640 |
| Highest Grade | G-8 |
| 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 William Muller across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Muller
Head · 1940 · age 36 · b. ~1904 · 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 — Los-Angeles-County, California
Open full size
1940 US Federal Census — Los-Angeles-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00372-00127)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mildred M. Smith | 33 | Daughter | Stenographer | California |
| 42 | Smith | None | — | — | — |
| 43 | John F. Day | 57 | Head | Machinist | Illinois |
| 44 | Margaret S. Day | 54 | Wife | — | Missouri |
| 45 | Morris Ross | 36 | Head | Manager | England |
| 46 | Rhoda S. Ross | 36 | Wife | — | New York |
| 47 | Dorothy Ross | 11 | Daughter | — | California |
| 48 | Frances Ross | 7 | Daughter | — | California |
| 49 | David Ross | 58 | Father | — | Russia |
| 50 | David Aster | 29 | Lodger | Manager | Pennsylvania |
| 51 | William V. Hartzel | 34 | Head | Proprietor | Kansas |
| 52 | Nellie Hartzel | 30 | Wife | — | Oklahoma |
| 53 | Virginia Hartzel | 13 | Daughter | — | New Mexico |
| 54 | Byron Hartzel | 10 | Son | — | California |
| 55 | Ray Martin | 33 | Head | Sub-Assembly | Iowa |
| 56 | Shirley Martin | 31 | Wife | — | Iowa |
| 57 | Rex Lorenzo Martin | 12 | Son | — | Iowa |
| 58 | Casper Diercks | 70 | Head | — | Wisconsin |
| 59 | Henry Diercks | 31 | Son | Turret Lathe | South Dakota |
| 60 | Lawrence Diercks | 23 | Son | Grinder | South Dakota |
| 61 | Dolores Diercks | 18 | Granddaughter | Housework | South Dakota |
| 62 | Oscar Carlson | 49 | Head | Salesman | Sweden |
| 63 | Addie D. Carlson | 47 | Wife | Chrysantherum | Indiana |
| 64 | Cleo Shirley Carlson | 16 | Daughter | — | California |
| 65 | Cyril Farrand | 45 | Head | Teacher | Iowa |
| 66 | Florence Farrand | 43 | Wife | — | Iowa |
| 67 | Joan Ruth Farrand | 11 | Daughter | — | California |
| 68 | Hunter Farrand | 8 | Son | — | California |
| 69 | Anna K. Hunter | 77 | Mother-in-law | — | Sweden |
| 70 | Charles Cummins | 56 | Head | House Superintendent | Indiana |
| 71 | Ruth Cummins | 53 | Wife | — | Indiana |
| 72 | Frank Worley | 34 | Head | Gauger | Missouri |
| 73 | Grace D. Worley | 31 | Wife | — | Nebraska |
| 74 | Jeanne Worley | 13 | Daughter | — | Nebraska |
| 75 | William R. Muller THIS PERSON | 36 | Head | Laborer | California |
| 76 | Theresa D. Muller | 31 | Wife | — | California |
| 77 | William Muller | 11 | Son | — | California |
| 78 | Robert Muller | 9 | Son | — | California |
| 79 | Helen Muller | 3 | Daughter | — | California |
| 80 | Sidney Huzzo | 47 | Head | Truck Driver | California |
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)