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Alfred Johnson — 1920 US Census Record
Linked across censuses1920 United States Federal Census · San Francisco, California
Our Model Tree links this Alfred Johnson across the 1910 and 1920 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a son (b.~1907), then head of a 9-person household.
Age 13
b. ~1907
Male
Son
Born: California
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | San Francisco, California |
| Surname | Johnson |
| Given Name | Alfred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Illinois |
| Mother's Birthplace | California |
| Additional Details | |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1907 |
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.
9 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Alfred | Age | Birth yr |
|---|---|---|---|---|
| Edith Johnson | Daughter | — | 4 | ~1916 |
| Ruth Johnson | Daughter | — | 6 | ~1914 |
| Edward Johnson | Head | — | 38 | ~1882 |
| Adyan Johnson | Son | — | 17 | ~1903 |
| Kenneth Johnson | Son | — | 8 | ~1912 |
| Alfred Johnson | Son | — | 13 | ~1907 |
| Leonard Johnson | Son | — | 10 | ~1910 |
| Milton Johnson | Son | — | 17 | ~1903 |
| Marie Johnson | Spouse | — | 35 | ~1885 |
Census Appearances
1910
San Francisco, …
Son, age 4
San Francisco, California · implied b. ~1906 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Alfred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Chicago |
| Mother's Birthplace | California |
| Occupation | none |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
San Francisco, …
Son, age 13
San Francisco, California · implied b. ~1907 — 9 household members
| Surname | Johnson |
| Given Name | Alfred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Illinois |
| Mother's Birthplace | California |
| 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 Alfred Johnson across 2 US Census years (1910 and 1920) in San Francisco, California, using XGBoost record linkage.
Show:
This person
Anchor record
Alfred Johnson
Son · 1920 · age 13 · b. ~1907 · California
★ You are viewing this record
Sibling
Milton Johnson
Sibling · 1920 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Johnson
Sibling · 1920 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Adyan Johnson
Sibling · 1920 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Johnson
Sibling · 1920 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Johnson
Sibling · 1920 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edith Johnson
Sibling · 1920 · age 4
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:1920:14thcensusofpopu133unit:0501)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ellen Purvess | 74 | Head | — | Ireland |
| 2 | John R. Purvess | 43 | Son | Machinist | Nevada |
| 3 | Nathaniel Purvess | 41 | Son | Machinist | Nevada |
| 4 | Sarah J. Brown | 45 | Daughter | Bookkeeper | Nevada |
| 5 | Menuninatino | 70 | Lodger | Manager | Italy |
| 6 | Maud Welch | 44 | Head | — | California |
| 7 | John Welch | 19 | Son | Mechanic | California |
| 8 | Patricia Welch | 7 | Daughter | — | California |
| 9 | William J. Murphy | 39 | Brother | Electrician | California |
| 10 | Aloysius Murphy | 37 | Brother | Gardner | California |
| 11 | Jakob Karuga | 59 | Head | Cooper | Austria |
| 12 | Andriana Karuga | 60 | Wife | — | Austria |
| 13 | Nicholas Karuga | 37 | Son | Cooper | Austria |
| 14 | John Karuga | 25 | Son | Drying | Austria |
| 15 | Louis Karuga | 24 | Son | Clerk | California |
| 16 | John Mckenna | 44 | Head | Laborer | Ireland |
| 17 | Mary Mckenna | 42 | Wife | Keeper | California |
| 18 | John Mckenna | 22 | Son | Solicitor | California |
| 19 | Pete Scuffins | 23 | Boarder | Stableman | California |
| 20 | John Welch | 53 | Lodger | Cooker | Ireland |
| 21 | Pete Baker | 61 | Lodger | Teamster | Sweden |
| 22 | Sarah J. Wood | 72 | Lodger | — | New York |
| 23 | Pete De Girolamo | 38 | Head | Painter | Italy |
| 24 | Marie De Girolamo | 30 | Wife | Packer | California |
| 25 | Anthony De Girolamo | 11 | Daughter | — | California |
| 26 | Rosary De Girolamo | 8 | Daughter | — | California |
| 27 | James Williams | 30 | Head | Teamster | California |
| 28 | Alice Williams | 28 | Wife | Packer | California |
| 29 | Alice May Williams | 8 | Daughter | — | California |
| 30 | Gertrude Gould | 42 | Head | Waitress | Illinois |
| 31 | Kate Moran | 45 | Head | — | Ireland |
| 32 | Ralph Dewey | 38 | Head | Laborer | Vermont |
| 33 | Babe Dewey | 23 | Wife | Dipper | Colorado |
| 34 | Hannah Betty | 33 | Head | Nurse | Ireland |
| 35 | Frank Killman | 32 | Head | Shoemaker | Finland |
| 36 | Tess Killman | 29 | Wife | — | Finland |
| 37 | Frank Killman | 6 | Son | — | California |
| 38 | Raymond Killman | 4 | Son | — | California |
| 39 | Edward Johnson | 38 | Head | Foreman | Illinois |
| 40 | Marie Johnson | 35 | Wife | — | California |
| 41 | Milton Johnson | 17 | Son | Apprentice | California |
| 42 | Adyan Johnson | 17 | Son | Apprentice | California |
| 43 | Alfred Johnson THIS PERSON | 13 | Son | — | California |
| 44 | Leonard Johnson | 10 | Son | — | California |
| 45 | Kenneth Johnson | 8 | Son | — | California |
| 46 | Ruth Johnson | 6 | Daughter | — | California |
| 47 | Edith Johnson | 4 | Daughter | — | California |
| 48 | Albert Walther | 44 | Head | Inspector | Switzerland |
| 49 | Emma Walther | 40 | Wife | — | California |
| 50 | Albert Walther | 14 | Son | — | California |
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)