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William Larkin — 1930 US Census Record
Linked across censuses1930 United States Federal Census · San Francisco, California
Our Model Tree links this William Larkin across the 1930 and 1940 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a son (b.~1902), then head of a 8-person household.
Age 28
b. ~1902
Male
Son
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Larkin |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Northern Ireland |
| Mother's Birthplace | California |
| Additional Details | |
| Occupation | Sales Manager |
| Industry | Auto Supplies |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Sales Manager |
| Township / Ward | San Francisco Town |
| Est. Birth Year | ~1902 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Alice Larkin | Other | — | 23 | ~1907 |
| Mary Larkin | Spouse | — | 58 | ~1872 |
| Alice Larkin | Daughter | — | 25 | ~1905 |
| John Larkin | Son | — | 21 | ~1909 |
| James Larkin | Son | — | 23 | ~1907 |
| James Larkin | Head | — | 56 | ~1874 |
| Robert Larkin | Son | — | 19 | ~1911 |
| William Larkin | Son | — | 28 | ~1902 |
Census Appearances
1930
San Francisco, …
Son, age 28
San Francisco, California · implied b. ~1902 — 8 household members
| Surname | Larkin |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Northern Ireland |
| Mother's Birthplace | California |
| Occupation | Sales Manager |
| Industry | Auto Supplies |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Other, age 43
San-Francisco-County, California · implied b. ~1897 — 40 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larkins |
| Given Name | William Banks |
| Relationship to Head | Guest |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco City |
| 1935 Residence (County) | San Francisco |
| Occupation | Salesman |
| Industry | Automobiles |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 4012 |
| Highest Grade | Hs 4 |
| 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 Larkin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Larkin
Son · 1930 · age 28 · b. ~1902 · California
★ You are viewing this record
Sibling
John Larkin
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Larkin
Sibling · 1930 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Larkin
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Larkin
Sibling · 1930 · age 19
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
1930 US Federal Census — San Francisco, California
Open full size
1930 US Federal Census — San Francisco, California
Page Contents
50 people indexed on this census page (ia:1930:californiacensus00reel206:0600)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Minnie Calis | 47 | Wife | — | Alabama |
| 52 | Joseph Brown | 60 | Head | Manager | Ohio |
| 53 | Sarah Brown | 48 | Wife | — | United States |
| 54 | James Zachary | 61 | Head | Merchant | New York |
| 55 | Mary Zachary | 48 | Wife | — | Ireland |
| 56 | William Lange | 31 | Head | Manager | Germany |
| 57 | Sophie Lange | 28 | Wife | — | Switzerland |
| 58 | Ruth Lange | 9 | Daughter | — | California |
| 59 | Alice Lange | 7 | Daughter | — | California |
| 60 | Ernest Lange | 4 | Son | — | California |
| 61 | William Lange | 2 | Son | — | California |
| 62 | Fred Lange | 31 | Brother | Manager | Germany |
| 63 | Emma Lange | 31 | Sister | — | Germany |
| 64 | James Lange | 42 | Head | — | US |
| 65 | Anna Lange | 41 | Wife | — | US |
| 66 | James Lange | 15 | Son | — | US |
| 67 | Lange | None | Head | — | England |
| 68 | Lange | None | Wife | — | Sweden |
| 69 | Lange | None | Head | — | Ohio |
| 70 | James Larkin | 56 | Head | Teamster | Northern Ireland |
| 71 | Mary Larkin | 58 | Wife | — | California |
| 72 | William Larkin THIS PERSON | 28 | Son | Sales Manager | California |
| 73 | Alice Larkin | 25 | Daughter | Female Clerk | California |
| 74 | James Larkin | 23 | Son | Clerk | California |
| 75 | Alice Larkin | 23 | Daughter-in-law | Office Clerk | California |
| 76 | John Larkin | 21 | Son | Salesman | California |
| 77 | Robert Larkin | 19 | Son | Messenger | California |
| 78 | Larkin | None | Head | Plumber | Ohio |
| 79 | Larkin | None | Wife | — | California |
| 80 | Larkin | None | Head | — | Kentucky |
| 81 | Larkin | None | Head | — | England |
| 82 | Larkin | None | Head | — | England |
| 83 | Larkin | None | Head | — | — |
| 84 | Larkin | None | Head | — | — |
| 85 | Larkin | None | Head | — | — |
| 86 | Larkin | None | Head | — | — |
| 87 | Larkin | None | Head | — | California |
| 88 | Larkin | None | Head | — | New York |
| 89 | Larkin | None | Head | — | Virginia |
| 90 | Larkin | None | Head | — | Indiana |
| 91 | Larkin | None | Head | — | California |
| 92 | Larkin | None | Head | — | — |
| 93 | Larkin | None | Head | — | England |
| 94 | Larkin | None | Head | — | US |
| 95 | Larkin | None | Head | — | US |
| 96 | Frank Della Maggiora | 32 | Head | Barber | Italy |
| 97 | Mary Della Maggiora | 29 | Wife | — | Italy |
| 98 | Dante Della Maggiora | 11 | Son | — | Italy |
| 99 | George Della Maggiora | 3 | Son | — | California |
| 100 | George Della Maggiora | 1 | Son | — | California |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)