NP
Nels Peterson — 1920 US Census Record
Model Tree available1920 United States Federal Census · Mendocino, California
Our Model Tree links this Nels Peterson across the 1920, 1930 and 1940 US Censuses in Mendocino, California (XGBoost, ~Confirmed), with identified parents George & George — first a son (b.~1909), then head of a 5-person household.
Age 11
b. ~1909
Male
Son
Born: California
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Mendocino, California |
| Surname | Peterson |
| Given Name | Nels |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Finnish |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Ten Mile Township Pudding Creek Precinct |
| Est. Birth Year | ~1909 |
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.
5 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Nels | Age | Birth yr |
|---|---|---|---|---|
| George Peterson | Head | — | 48 | ~1872 |
| Kati Peterson | Spouse | — | 49 | ~1871 |
| William Peterson | Son | — | 18 | ~1902 |
| Nels Peterson | Son | — | 11 | ~1909 |
| George Peterson | Son | — | 22 | ~1898 |
Census Appearances
1920
Mendocino, California
Son, age 11
Mendocino, California · implied b. ~1909 — 5 household members
| Surname | Peterson |
| Given Name | Nels |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Finnish |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Mendocino, California
Son, age 21
Mendocino, California · implied b. ~1909 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Neil |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | laborer |
| Industry | farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Mendocino-County, California
Head, age 32
Mendocino-County, California · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Neil |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | Ten Mile |
| 1935 Residence (County) | Mendocino |
| Occupation | Farmer |
| Industry | Poultry |
| Class of Worker | OA |
| Hours Worked | 56 |
| Income (1939) | 0 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same House |
| 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 Nels Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Peterson (~0.92 confidence) and father George Peterson (~0.92 confidence) and mother Kati Peterson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Peterson
b. ~1872
Source father
● Household
· direct · ~0.92
Father
George Peterson
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Kati Peterson
b. ~1871
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Nels Peterson
Son · 1920 · age 11 · b. ~1909 · California
★ You are viewing this record
Sibling
George Peterson
Sibling · 1920 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Peterson
Sibling · 1920 · age 18
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 — Mendocino, California
Open full size
1920 US Federal Census — Mendocino, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu121unit:0317)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Johnson | 2 | Son | — | California |
| 2 | Ellis Johnson | 27 | Head | Carpenter | Finland |
| 3 | Amanda Johnson | 28 | Wife | — | Finland |
| 4 | Leonard Johnson | 9 | Son | — | California |
| 5 | Elinor Johnson | 9 | Daughter | — | California |
| 6 | Eva Johnson | 7 | Son | — | California |
| 7 | Gordon Johnson | 5 | Son | — | California |
| 8 | Villo Johnson | 2 | Son | — | California |
| 9 | M. G. Foster | 43 | Head | Proprietor | Illinois |
| 10 | Cora Foster | 32 | Wife | — | South Dakota |
| 11 | Emmett Foster | 18 | Son | Cook | South Dakota |
| 12 | Russell Foster | 12 | Son | — | California |
| 13 | Dorothy Foster | 1 | Daughter | — | California |
| 14 | Elias Sastar | 60 | Head | Tie Maker | Finland |
| 15 | Mary Sastar | 58 | Wife | — | Finland |
| 16 | Hilda Sastar | 24 | Daughter | — | Minnesota |
| 17 | Emil Koski | 38 | Head | Carpenter | Finland |
| 18 | Hilda Koski | 34 | Wife | — | Finland |
| 19 | Jennie Koski | 11 | Daughter | — | California |
| 20 | Milton Koski | 8 | Son | — | California |
| 21 | Enar Koski | 6 | Son | — | California |
| 22 | Irma Koski | 4 | Daughter | — | California |
| 23 | Vieno Koski | 3 | Daughter | — | California |
| 24 | Allan Koski | 1 | Son | — | California |
| 25 | Henry Koski | 26 | Brother | Tie Maker | Finland |
| 26 | John Wilson | 55 | Head | Carpenter | Finland |
| 27 | John W. Wilson | 27 | Son | — | California |
| 28 | George Peterson | 48 | Head | Farmer | Finland |
| 29 | Kati Peterson | 49 | Wife | — | Finland |
| 30 | George Peterson | 22 | Son | Laborer | California |
| 31 | William Peterson | 18 | Son | — | California |
| 32 | Nels Peterson THIS PERSON | 11 | Son | — | California |
| 33 | Fred Rantanen | 42 | Head | Farmer | Finland |
| 34 | Ida Rantanen | 40 | Wife | — | Finland |
| 35 | Ellard Rantanen | 14 | Son | — | California |
| 36 | Sadie Rantanen | 12 | Daughter | — | California |
| 37 | Mat Wanhala | 37 | Head | Laborer | Finland |
| 38 | Anna Wanhala | 36 | Wife | — | Finland |
| 39 | Vilho Wanhala | 15 | Son | — | Massachusetts |
| 40 | Miranda Wanhala | 13 | Daughter | — | California |
| 41 | Clarence Wanhala | 11 | Son | — | California |
| 42 | Arvid Wanhala | 8 | Son | — | California |
| 43 | Vallo Lampi | 5 | Boarder | — | California |
| 44 | Albert Lampi | 4 | Boarder | — | California |
| 45 | Laila Lampi | 2 | Boarder | — | California |
| 46 | August Ranta | 47 | Head | Fisherman | Finland |
| 47 | Sanna Ranta | 35 | Wife | — | Finland |
| 48 | Aina Ranta | 7 | Daughter | — | California |
| 49 | Lempi Ranta | 3 | Daughter | — | California |
| 50 | Abel Piilonen | 32 | Head | Laborer | Finland |
Pedigree Summary
Nels + 2 siblings
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)