WF
William Fischer — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this William Fischer across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Male
Son
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Fischer |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Occupation | Clerk |
| Industry | Auto Parts |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1440 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same house |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Clerk |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1917 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Anna Fischer | Spouse | — | 49 | ~1891 |
| William Fischer | Head | — | 50 | ~1890 |
| Anna Fischer | Daughter | — | 21 | ~1919 |
| William Fischer | Son | — | 23 | ~1917 |
Census Appearances
1920
San Francisco, …
Son, age 2
San Francisco, California · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fischer |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Speaks English | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
San Mateo, …
Son, age 12
San Mateo, California · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fischer |
| Given Name | William Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
San-Francisco-County, California
Son, age 23
San-Francisco-County, California · implied b. ~1917 — 4 household members
| Surname | Fischer |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Occupation | Clerk |
| Industry | Auto Parts |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1440 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same house |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Fischer across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father William Fischer (~0.92 confidence) and father William Fischer (~0.92 confidence) and mother Anna Fischer (~0.92 confidence) and father William Fischer (~0.92 confidence) and mother Ada Fischer (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Fischer
b. ~1889
Source father
● Household
· direct · ~0.92
Father
William Fischer
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Anna Fischer
b. ~1891
Source mother
● Household
· direct · ~0.92
Father
William Fischer
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Ada Fischer
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Fischer
Son · 1940 · age 23 · b. ~1917 · California
★ You are viewing this record
Sibling
Anna Fischer
Sibling · 1940 · age 21
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
40 people indexed on this census page (nara:1940:m-t0627-00302-00247)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rosina Gavin | 44 | wife | — | California |
| 42 | Viola Gavin | 18 | daughter | New Worker | California |
| 43 | Mary Candrado | 50 | Head | — | Italy |
| 44 | Victoria Candrado | 21 | daughter | Clerk | California |
| 45 | Maurice Richardson | 46 | Head | Book Keeper | Illinois |
| 46 | Fred Nearbrass | 60 | Head | Laborer | California |
| 47 | Domenic Rossi | 45 | Head | Scavenger | California |
| 48 | Matilda Rossi | 44 | wife | — | Italy |
| 49 | Florence Rossi | 18 | daughter | — | California |
| 50 | Frank Casebolt | 36 | Head | Driver | California |
| 51 | Mary Casebolt | 29 | wife | — | Poland |
| 52 | Marie Casebolt | 2 | daughter | — | California |
| 53 | Dorothy Alsloski | 15 | stepdaughter | — | California |
| 54 | Alvin Alsloski | 13 | stepson | — | California |
| 55 | Harry Uelbaum | 52 | Head | Engineer | Germany |
| 56 | Anna Uelbaum | 47 | wife | — | California |
| 57 | Agnes Lundman | 52 | Head | — | Denmark |
| 58 | Oris Furr | 33 | son in law | Mechanic | Mississippi |
| 59 | Lucile Furr | 32 | daughter | Cashier | California |
| 60 | Aron Warnick | 43 | Head | Watchman | Washington |
| 61 | Mary Warnick | 25 | wife | Maid | No. Dakota |
| 62 | June Warnick | 17 | daughter | — | Washington |
| 63 | Thomas Warnick | 16 | son | — | Washington |
| 64 | Dixie Warnick | 12 | daughter | — | No. Dakota |
| 65 | Judson Warnick | 9 | son | — | No. Dakota |
| 66 | Stephen Sullivan | 52 | Head | Sea Captain | Irish Free St |
| 67 | Katherine Sullivan | 51 | wife | — | Irish Free St |
| 68 | Regina Sullivan | 20 | daughter | Typist | California |
| 69 | Kristine Carlson | 70 | Head | — | Finland |
| 70 | Paul Thormahlen | 45 | Head | Trimmer | California |
| 71 | Lillian Thormahlen | 44 | wife | — | California |
| 72 | Paul Thormahlen | 22 | son | Apprentice | California |
| 73 | Beverly Thormahlen | 11 | daughter | — | California |
| 74 | William Fischer | 50 | Head | Plasterer | Germany |
| 75 | Anna Fischer | 49 | wife | Housekeeper | Germany |
| 76 | William Fischer THIS PERSON | 23 | son | Clerk | Minnesota |
| 77 | Anna Fischer | 21 | daughter | New Worker | California |
| 78 | Albert Walker | 29 | Head | Butcher | California |
| 79 | Walthe Walker | 26 | wife | — | California |
| 80 | Ruth Walker | 5 | daughter | — | California |
Pedigree Summary
William + 1 sibling
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)