WS
William Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this William Sullivan across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1916), then head of a 3-person household.
Age 24
b. ~1916
Male
Head
Born: California
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Sullivan |
| Given Name | William H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | SAN FRANCISCO CO |
| 1935 Residence (County) | SAN FRANCISCO |
| Additional Details | |
| Occupation | Warehouseman |
| Industry | Groceries |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Warehouseman |
| Township / Ward | San Francisco Co |
| Est. Birth Year | ~1916 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Sullivan | Head | — | 24 | ~1916 |
| William Sullivan | Son | — | 1 | ~1939 |
| Carmen Sullivan | Spouse | — | 24 | ~1916 |
Census Appearances
1920
San Francisco, …
Son, age 4
San Francisco, California · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Son, age 14
San Francisco, California · implied b. ~1916 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Head, age 24
San-Francisco-County, California · implied b. ~1916 — 3 household members
| Surname | Sullivan |
| Given Name | William H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | SAN FRANCISCO CO |
| 1935 Residence (County) | SAN FRANCISCO |
| Occupation | Warehouseman |
| Industry | Groceries |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | Hs 2 |
| 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 Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Sullivan (~0.92 confidence) and father John Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence) and mother Agnes Sullivan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Sullivan
b. ~1870
Source father
● Household
· direct · ~0.92
Father
John Sullivan
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Agnes Sullivan
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Sullivan
Head · 1940 · age 24 · b. ~1916 · California
★ You are viewing this record
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-t0627-00310-00124)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Julia Luini | 30 | Wife | — | Ireland |
| 2 | Elizabeth Luini | 2 | Daughter | — | California |
| 3 | John Mchale | 39 | Head | Laborer | Montana |
| 4 | Ann Mchale | 41 | Wife | — | Ireland |
| 5 | Ann Catherine Mchale | 5 | Daughter | — | California |
| 6 | Herman A. Stegman | 41 | Head | Musician | Washington |
| 7 | Emily S. Bone | 56 | Head | Stenographer | California |
| 8 | George A. Anderson | 39 | Head | Car Repairer | Utah |
| 9 | Ethel L. Anderson | 31 | Wife | — | California |
| 10 | Donald A. Anderson | 1 | Son | — | California |
| 11 | Annie Erfurt | 79 | Head | Retired | Germany |
| 12 | Chester J. Ward | 28 | Lodger | Teamster | Illinois |
| 13 | Mary K. Mossgrove | 61 | Head | Folder | Missouri |
| 14 | Karl A. Mossgrove | 39 | Son | Hardwood Floor | Missouri |
| 15 | Walter W. Wilson | 26 | Head | Mechanic | California |
| 16 | Gertrude M. Wilson | 24 | Wife | — | Canada |
| 17 | Walter W. Wilson | 5 | Son | — | California |
| 18 | Frederick A. Wilson | 4 | Son | — | California |
| 19 | Harold L. Wilson | 1 | Son | — | California |
| 20 | Mary Anne Wilson | 0 | Daughter | — | California |
| 21 | William H. Sullivan THIS PERSON | 24 | Head | Warehouseman | California |
| 22 | Carmen Sullivan | 24 | Wife | — | California |
| 23 | William H. Sullivan | 1 | Son | — | California |
| 24 | Royal H. Perry | 22 | Head | Machinist | California |
| 25 | Elsie M. Perry | 18 | Wife | — | California |
| 26 | Otis S. Dunn | 33 | Head | Minister | California |
| 27 | Mabel I. Dunn | 27 | Wife | — | California |
| 28 | Joel D. Dunn | 5 | Son | — | California |
| 29 | Sharon R. Dunn | 2 | Daughter | — | California |
| 30 | Sydney G. Farley | 23 | Head | Printer | California |
| 31 | Lois I. Farley | 23 | Wife | — | California |
| 32 | Joseph Forsyth | 27 | Head | Stock Clerk | Indiana |
| 33 | Agnes Forsyth | 17 | Wife | Manager | Scotland |
| 34 | James Doyle | 66 | Head | Driver | Michigan |
| 35 | Ella Doyle | 67 | Wife | — | Michigan |
| 36 | Jack A. Dill | 34 | Head | Janitor | S. Carolina |
| 37 | Nora B. Dill | 24 | Wife | — | California |
| 38 | Jack A. Dill | 1 | Son | — | California |
| 39 | Thomas L. Keating | 24 | Head | Operator | California |
| 40 | Alice L. Keating | 19 | Wife | — | California |
Pedigree Summary
William
Gen 1 · 4 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)