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Alfred Nelson — 1920 US Census Record
Model Tree available1920 United States Federal Census · San Francisco, California
Our Model Tree links this Alfred Nelson across the 1900, 1910 and 1920 US Censuses in San Francisco, California (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1891), then head of a 4-person household.
Age 29
b. ~1891
Male
Son
Born: California
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | San Francisco, California |
| Surname | Nelson |
| Given Name | Alfred H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Additional Details | |
| Occupation | Clerk |
| Industry | Post Office |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Clerk |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1891 |
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.
4 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Alfred | Age | Birth yr |
|---|---|---|---|---|
| John Nelson | Son | — | 21 | ~1899 |
| Nels Nelson | Head | — | 57 | ~1863 |
| Alfred Nelson | Son | — | 29 | ~1891 |
| Julius Nelson | Son | — | 23 | ~1897 |
Census Appearances
1900
San Francisco, …
Son, age 9
San Francisco, California · implied b. ~1891 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Alfred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | California |
| Birth Month | May |
| Birth Year | 1891 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Ireland |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1910
San Francisco, …
Son, age 18
San Francisco, California · implied b. ~1892 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Alfred J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Ireland |
| Occupation | Clerk |
| Industry | Railroad |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
San Francisco, …
Son, age 29
San Francisco, California · implied b. ~1891 — 4 household members
| Surname | Nelson |
| Given Name | Alfred H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Clerk |
| Industry | Post Office |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| 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 Nelson across 3 US Census years (1900, 1910 and 1920) in San Francisco, California, using XGBoost record linkage. Identified parents: father John Nelson (~0.92 confidence) and father John Nelson (~0.92 confidence) and father Nels Nelson (~0.92 confidence) and mother Mary Nelson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Nelson
b. ~1868
Source father
● Household
· direct · ~0.92
Father
John Nelson
b. ~1863
Source father
● Household
· direct · ~0.92
Father
Nels Nelson
b. ~1863
Source father
● Household
· direct · ~0.92
Mother
Mary Nelson
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Alfred Nelson
Son · 1920 · age 29 · b. ~1891 · California
★ You are viewing this record
Sibling
John Nelson
Sibling · 1920 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julius Nelson
Sibling · 1920 · age 23
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:1920:14thcensusofpopu136unit:1067)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Tyler | 47 | Head | Fireman | California |
| 2 | Edith Tyler | 45 | Wife | None | California |
| 3 | Ethel Tyler | 26 | Daughter | Operator | California |
| 4 | Molly Tyler | 17 | Son | Mechanic | California |
| 5 | Frances Tyler | 19 | Daughter | None | California |
| 6 | Charles Tyler | 11 | Son | None | California |
| 7 | George Tyler | 8 | Son | None | California |
| 8 | Ed B. Stapleton | 35 | Head | Engineer | Maryland |
| 9 | Elizabeth Stapleton | 41 | Wife | None | California |
| 10 | Wilhelmina Martin | 45 | Head | Teacher | Ireland |
| 11 | Katherine Boulware | 33 | Cousin | None | England |
| 12 | Louise Donahue | 27 | Cousin | None | California |
| 13 | Nicolas Barry | 46 | Head | Laborer | Ireland |
| 14 | Mary Barry | 46 | Wife | None | Ireland |
| 15 | Helen Barry | 13 | Daughter | None | California |
| 16 | May Barry | 9 | Daughter | None | California |
| 17 | Cornelius Mccarthy | 70 | Head | None | Ireland |
| 18 | Mary Mccarthy | 32 | Daughter | Stenographer | California |
| 19 | Lee Yin | 52 | Head | Laborer | China |
| 20 | Jung Chun | 40 | Lodger | Laborer | China |
| 21 | Yen Leon | 16 | Lodger | Laborer | China |
| 22 | Qua Si Wong | 58 | Lodger | Ironer | China |
| 23 | Fong Sing | 55 | Lodger | Ironer | China |
| 24 | Toy Yin | 30 | Lodger | Ironer | China |
| 25 | Lyn Fong | 47 | Lodger | Ironer | China |
| 26 | Chong Yin | 51 | Lodger | Ironer | China |
| 27 | George G. Nott | 58 | Head | None | Arkansas |
| 28 | Georgiana Nott | 56 | Wife | Clerk | Louisiana |
| 29 | Halloway S. Nott | 25 | Son | Storekeeper | Wyoming |
| 30 | Alexander Angus | 28 | Head | Gen. Hauling | California |
| 31 | Kathryn Angus | 27 | Wife | None | California |
| 32 | Lorraine Angus | 1 | Daughter | None | California |
| 33 | Delia Sullivan | 63 | Head | None | Ireland |
| 34 | Celia Kelly | 17 | Granddaughter | None | California |
| 35 | Edward Kelly | 16 | Grandson | None | California |
| 36 | George F. Aldrich | 47 | Head | Cook | Tennessee |
| 37 | Emily J. Aldrich | 32 | Wife | None | California |
| 38 | Roberta B. Aldrich | 12 | Daughter | None | California |
| 39 | Robert Aldrich | 9 | Son | None | Washington |
| 40 | Helen Aldrich | 5 | Daughter | None | California |
| 41 | Pierre Male | 38 | Head | Riveter | California |
| 42 | Beatrice Male | 32 | Wife | None | California |
| 43 | Pierre Jr. Male | 11 | Son | None | California |
| 44 | Dorothy Male | 10 | Daughter | None | California |
| 45 | Stanley Male | 7 | Son | None | California |
| 46 | Beatrice Male | 5 | Daughter | None | California |
| 47 | Nels B. Nelson | 57 | Head | Laborer | Sweden |
| 48 | Alfred H. Nelson THIS PERSON | 29 | Son | Clerk | California |
| 49 | Julius Nelson | 23 | Son | None | California |
| 50 | John S. Nelson | 21 | Son | None | California |
Pedigree Summary
Alfred + 2 siblings
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 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)