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William Williams — 1920 US Census Record
Model Tree available1920 United States Federal Census · San Francisco, California
Our Model Tree links this William Williams across the 1900, 1910 and 1920 US Censuses in San Francisco, California (XGBoost, ~Confirmed), with identified parents David & Frank — first a son (b.~1894), then head of a 5-person household.
Age 26
b. ~1894
Male
Son
Born: California
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | San Francisco, California |
| Surname | Williams |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1894 |
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 1920 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Frank Williams | Head | — | 53 | ~1867 |
| John Williams | Son | — | 18 | ~1902 |
| David Williams | Son | — | 32 | ~1888 |
| William Williams | Son | — | 26 | ~1894 |
| Margaret Williams | Spouse | — | 52 | ~1868 |
Census Appearances
Son, age 7
San Francisco, California · implied b. ~1893 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | Willie |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | California |
| Birth Month | Dec |
| Birth Year | 1893 |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1910
San Francisco, …
Son, age 16
San Francisco, California · implied b. ~1894 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Williams |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | Teamster |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
San Francisco, …
Son, age 26
San Francisco, California · implied b. ~1894 — 5 household members
| Surname | Williams |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| 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 Williams across 3 US Census years (1900, 1910 and 1920) in San Francisco, California, using XGBoost record linkage. Identified parents: father David Williams (~0.92 confidence) and father Frank Williams (~0.92 confidence) and father David Williams (~0.92 confidence) and mother Mary Williams (~0.92 confidence) and mother Margaret Williams (~0.92 confidence) and mother Margaret Williams (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
David Williams
b. ~1868
Source father
● Household
· direct · ~0.92
Father
Frank Williams
b. ~1867
Source father
● Household
· direct · ~0.92
Father
David Williams
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Mary Williams
b. ~1867
Source mother
● Household
· direct · ~0.92
Mother
Margaret Williams
b. ~1868
Source mother
● Household
· direct · ~0.92
Mother
Margaret Williams
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Williams
Son · 1920 · age 26 · b. ~1894 · California
★ You are viewing this record
Sibling
John Williams
Sibling · 1920 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Williams
Sibling · 1920 · age 32
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
1920 US Federal Census — San Francisco, California
Open full size
1920 US Federal Census — San Francisco, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu132unit:0785)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Maurice Matheron | 10 | Son | — | California |
| 2 | Henry Cadie | 38 | Lodger | Proprietor | France |
| 3 | Mary Cadie | 33 | Wife | — | France |
| 4 | René Cadie | 9 | Son | — | California |
| 5 | Patrick Howard | 38 | Lodger | Machinist | Ireland |
| 6 | Charles Dambacher | 24 | Lodger | Clerk | California |
| 7 | Patrick Freeman | 36 | Lodger | Riveter | Ireland |
| 8 | Frank Mclean | 36 | Lodger | Molder | California |
| 9 | William King | 20 | Lodger | Boilermaker | California |
| 10 | Frank Williams | 53 | Head | Laborer | California |
| 11 | Margaret Williams | 52 | Wife | — | California |
| 12 | David Williams | 32 | Son | Policeman | California |
| 13 | William Williams THIS PERSON | 26 | Son | — | California |
| 14 | John Williams | 18 | Son | Tailor | California |
| 15 | Nicola Leone | 40 | Head | — | Syria |
| 16 | Mary Leone | 35 | Wife | — | Syria |
| 17 | Alfred Leone | 15 | Son | — | Syria |
| 18 | Raymond Leone | 5 | Son | — | California |
| 19 | Adele Leone | 4 | Daughter | — | California |
| 20 | Josephine Leone | 2 | Daughter | — | California |
| 21 | Rosa Saliba | 59 | Mother-in-law | — | Syria |
| 22 | Louis Fano | 40 | Head | Helper | Italy |
| 23 | Thomas Bailey | 45 | Lodger | Laborer | Ireland |
| 24 | Thomas Kenny | 47 | Lodger | Watchman | Ireland |
| 25 | Guido Marsano | 27 | Lodger | Conductor | Italy |
| 26 | John E. Murnane | 34 | Head | Proprietor | Nevada |
| 27 | Anetta Murnane | 30 | Wife | — | California |
| 28 | Emmett Murnane | 9 | Son | — | California |
| 29 | David Smith | 66 | Lodger | Cook | England |
| 30 | Thomas Ivory | 51 | Lodger | Laborer | Ireland |
| 31 | Theodore Cassimatis | 50 | Head | Laborer | Greece |
| 32 | Eleanor Clotty | 39 | Head | — | Ireland |
| 33 | John Clotty | 38 | Son | Inspector | New Zealand |
| 34 | James Clotty | 36 | Son | Inspector | New Zealand |
| 35 | Matthew Clotty | 26 | Son | Nurse | California |
| 36 | Emma Clotty | 24 | Son | Machinist | California |
| 37 | Charles Clotty | 23 | Son | Clerk | California |
| 38 | Rose E. Clotty | 21 | Daughter | Stenographer | California |
| 39 | Gellmo Pizza | 33 | Head | Laborer | Italy |
| 40 | Pasquina Pizza | 32 | Wife | Laundress | Italy |
| 41 | Amelia Pizza | 9 | Daughter | — | California |
| 42 | Martin O'Rourke | 50 | Head | Policeman | Ireland |
| 43 | Nellie O'Rourke | 49 | Wife | — | Ireland |
| 44 | Frank O'Rourke | 26 | Son | Salesman | California |
| 45 | Irene Fenton | 25 | Daughter | Bookkeeper | California |
| 46 | Joseph O'Rourke | 20 | Son | Mechanic | California |
| 47 | Vera O'Rourke | 15 | Daughter | — | California |
| 48 | Thomas Routs | 30 | Lodger | Seaman | Finland |
| 49 | — | None | — | — | — |
| 50 | Charles F. Davis | 42 | Lodger | Carpenter | Wisconsin |
Related Census Records
Pedigree Summary
William + 2 siblings
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)