ON
Oscar Nelson — 1920 US Census Record
Model Tree available1920 United States Federal Census · Alameda, California
Our Model Tree links this Oscar Nelson across the 1900, 1910 and 1920 US Censuses in Alameda, California (XGBoost, ~Confirmed), with identified parents Lars & C — first a son (b.~1896), then head of a 4-person household.
Age 24
b. ~1896
Male
Son
Born: California
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Alameda, California |
| Surname | Nelson |
| Given Name | Oscar C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Additional Details | |
| Occupation | Fireman |
| Industry | Railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Fireman |
| Township / Ward | Oakland City |
| Est. Birth Year | ~1896 |
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 Oscar | Age | Birth yr |
|---|---|---|---|---|
| Lillian Nelson | Daughter | — | 28 | ~1892 |
| Selma Nelson | Head | — | 51 | ~1869 |
| Arthur Webb | Other | — | 44 | ~1876 |
| Oscar Nelson | Son | — | 24 | ~1896 |
Census Appearances
1900
Alameda, California
Son, age 4
Alameda, California · implied b. ~1896 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Oscar E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | California |
| Birth Month | Jan |
| Birth Year | 1896 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1910
Alameda, California
Son, age 14
Alameda, California · implied b. ~1896 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
Alameda, California
Son, age 24
Alameda, California · implied b. ~1896 — 4 household members
| Surname | Nelson |
| Given Name | Oscar C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Fireman |
| Industry | Railroad |
| Class of Worker | W |
| 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 Oscar Nelson across 3 US Census years (1900, 1910 and 1920) in Alameda, California, using XGBoost record linkage. Identified parents: father Lars Nelson (~0.92 confidence) and father C Nelson (~0.92 confidence) and mother Selma Nelson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Lars Nelson
b. ~1859
Source father
● Household
· direct · ~0.92
Father
C Nelson
b. ~1860
Source father
● Household
· direct · ~0.92
Mother
Selma Nelson
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Nelson
Son · 1920 · age 24 · b. ~1896 · California
★ You are viewing this record
Sibling
Lillian Nelson
Sibling · 1920 · age 28
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 — Alameda, California
Open full size
1920 US Federal Census — Alameda, California
Page Contents
29 people indexed on this census page (ia:1920:14thcensusofpopu088unit:0269)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mabel | 14 | Daughter | — | California |
| 2 | Selma Nelson | 51 | Head | Caterer | Sweden |
| 3 | Lillian Nelson | 28 | Daughter | — | California |
| 4 | Oscar C. Nelson THIS PERSON | 24 | Son | Fireman | California |
| 5 | Arthur M. Webb | 44 | Son-in-law | Musician | Kentucky |
| 6 | Mary White | 68 | Head | — | West Virginia |
| 7 | Victoria Hedgeman | 70 | Lodger | — | Missouri |
| 8 | Parthenia Randolph | 50 | Head | Hair Specialist | California |
| 9 | Percy Randolph | 25 | Nephew | Machinist | California |
| 10 | Harry H. Craven | 45 | Boarder | Clerk | California |
| 11 | Joe Avella | 35 | Head | Retail Merchant | Italy |
| 12 | Ida Avella | 25 | Wife | — | Italy |
| 13 | Tony Avella | 4 | Son | — | California |
| 14 | Albert Clough | 33 | Head | Riveter | Kansas |
| 15 | Jessie Clough | 27 | Wife | Stenographer | California |
| 16 | Mary Bradbury | 56 | Head | Cook | Wisconsin |
| 17 | Louis Bradbury | 18 | Son | — | Montana |
| 18 | Tom Morris | 29 | Lodger | Barber | Greece |
| 19 | Chris J. Pape | 29 | Lodger | Chauffeur | Greece |
| 20 | Frank G. Pape | 31 | Lodger | Chauffeur | Greece |
| 21 | Eugene Doran | 53 | Lodger | Laborer | Ireland |
| 22 | Jeanette Wilson | 38 | Head | Nurse | California |
| 23 | Violet Wilson | 8 | Niece | — | California |
| 24 | William Lorenz | 39 | Head | Engineer | England |
| 25 | Anna Lorenz | 39 | Wife | — | New York |
| 26 | George W. Hoffman | 37 | Head | Foreman | Germany (Schleswig-Holstein) |
| 27 | Helen Hoffman | 24 | Wife | — | California |
| 28 | L. R. Light | 24 | Head | Clerk | California |
| 29 | John Cheerie | 25 | Head | Carpenter Helper | California |
Pedigree Summary
Oscar + 1 sibling
Gen 1 · 3 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)