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William Welch — 1920 US Census Record
Linked across censuses1920 United States Federal Census · San Francisco, California
Our Model Tree links this William Welch across the 1900, 1910 and 1920 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a head (b.~1869), then head of a 7-person household.
Age 51
b. ~1869
Male
Head
Born: England
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | San Francisco, California |
| Surname | Welch |
| Given Name | William J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | England |
| Year of Immigration | 1895 |
| Naturalization Status | Naturalized |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Additional Details | |
| Occupation | Machinist |
| Industry | Shipyard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | England |
| Year of Naturalization | 1904 |
| Birthplace (normalized) | england |
| Occupation | Machinist |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1869 |
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.
7 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Elena Welch | Daughter | — | 22 | ~1898 |
| Emma Welch | Daughter | — | 12 | ~1908 |
| Eleanor Welch | Daughter | — | 15 | ~1905 |
| William Welch | Head | — | 51 | ~1869 |
| Lewis Welch | Son | — | 17 | ~1903 |
| Herbert Welch | Son | — | 19 | ~1901 |
| Mary Welch | Spouse | — | 48 | ~1872 |
Census Appearances
1900
San Francisco, …
Head, age 31
San Francisco, California · implied b. ~1869 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | William H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | England |
| Birth Month | Dec |
| Birth Year | 1869 |
| Year of Immigration | 1898 |
| Naturalization Status | Alien |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Machinist |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | England |
| Birthplace (normalized) | england |
1910
San Francisco, …
Head, age 41
San Francisco, California · implied b. ~1869 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Welch |
| Given Name | William J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | England |
| Years Married | 13 |
| Year of Immigration | 1891 |
| Naturalization Status | Naturalized |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Machinist |
| Industry | Shipyard |
| Birth Country | England |
| Birthplace (normalized) | england |
1920
San Francisco, …
Head, age 51
San Francisco, California · implied b. ~1869 — 7 household members
| Surname | Welch |
| Given Name | William J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | England |
| Year of Immigration | 1895 |
| Naturalization Status | Naturalized |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Occupation | Machinist |
| Industry | Shipyard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | England |
| Year of Naturalization | 1904 |
| Birthplace (normalized) | england |
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 Welch across 3 US Census years (1900, 1910 and 1920) in San Francisco, California, using XGBoost record linkage.
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This person
Anchor record
William Welch
Head · 1920 · age 51 · b. ~1869 · California
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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:0755)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | James Mcdonnell | 27 | Son | Chauffeur | California |
| 52 | Edward Mcdonnell | 25 | Son | Clerk | California |
| 53 | Anna Mcdonnell | 21 | Daughter | Stenographer | California |
| 54 | Basil Strange | 44 | Head | Superintendent | Kentucky |
| 55 | Nora Strange | 41 | Wife | — | Ireland |
| 56 | Robert H Strange | 6 | Son | — | Indiana |
| 57 | William Strange | 5 | Son | — | Indiana |
| 58 | Jenny Jane Strange | 3 | Son | — | California |
| 59 | Mary Strange | 1 | Daughter | — | California |
| 60 | J. G. Jones | 54 | Head | Stenographer | Wales |
| 61 | May Jones | 53 | Wife | — | California |
| 62 | Ella Scougall | 26 | Daughter | Waitress | California |
| 63 | Alex Scougall | 30 | Son-in-law | Machinist | England |
| 64 | Michael Moore | 32 | Head | Conductor | Ireland |
| 65 | Elizabeth Moore | 31 | Wife | — | Ireland |
| 66 | Joseph P. Moore | 6 | Son | — | California |
| 67 | Elizabeth Moore | 3 | Daughter | — | California |
| 68 | Michael V. Hogan | 35 | Head | Policeman | Ireland |
| 69 | Georgina Hogan | 28 | Wife | — | Ireland |
| 70 | Dennis Donahue | 25 | Boarder | Special Policeman | Ireland |
| 71 | John Stewart | 35 | Head | Boilermaker | Scotland |
| 72 | Annie Stewart | 28 | Wife | — | Scotland |
| 73 | John Archie Stewart | 7 | Son | — | Canada |
| 74 | Andrew C. Stewart | 5 | Son | — | California |
| 75 | William J. Welch THIS PERSON | 51 | Head | Machinist | England |
| 76 | Mary E. Welch | 48 | Wife | — | England |
| 77 | Elena B. Welch | 22 | Daughter | — | California |
| 78 | Herbert Welch | 19 | Son | Draughtsman | California |
| 79 | Lewis R. Welch | 17 | Son | App. Coach | California |
| 80 | Eleanor F. Welch | 15 | Daughter | — | California |
| 81 | Emma G. Welch | 12 | Daughter | — | California |
| 82 | Walter Road | 53 | Head | Manager | England |
| 83 | Charlotte Road | 43 | Wife | — | Illinois |
| 84 | Walter H. Road | 10 | Son | — | California |
| 85 | Arthur Road | 7 | Son | — | Oregon |
| 86 | Thomas H. Roberts | 82 | Head | Roller | Wales |
| 87 | Sarah Roberts | 77 | Wife | — | Wales |
| 88 | Martin Brennan | 44 | Head | Laborer | Ireland |
| 89 | Bridget Brennan | 37 | Wife | — | Ireland |
| 90 | Michael Harrigan | 25 | Roomer | Laborer | Ireland |
| 91 | Jessie Tolson | 42 | Head | Waitress | Scotland |
| 92 | Lois Tolson | 15 | Daughter | — | California |
| 93 | Alice Tolson | 12 | Daughter | — | California |
| 94 | Christ Zalis | 40 | Head | Helper | Greece |
| 95 | Olga Zalis | 37 | Wife | — | Greece |
| 96 | George Zalis | 17 | Son | Riveter'S Boy | Greece |
| 97 | Christ Zalis | 11 | Son | — | Greece |
| 98 | Pete Zalis | 1 | Son | — | California |
| 99 | John Griffin | 50 | Head | Laborer | Ireland |
| 100 | Hannah Griffin | 51 | Wife | — | Ireland |
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)