RP
Robert Peterson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Cowlitz, Washington
Our Model Tree links this Robert Peterson across the 1920, 1930 and 1940 US Censuses in Cowlitz, Washington (XGBoost, ~Confirmed), with identified parents Axel & Mamie — first a son (b.~1919), then head of a 6-person household.
Age 11
b. ~1919
Male
Son
Born: Washington
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cowlitz, Washington |
| Surname | Peterson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Washington |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Township / Ward | Olequa Precinct |
| Est. Birth Year | ~1919 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Ina Peterson | Daughter | — | 19 | ~1911 |
| Irene Peterson | Daughter | — | 15 | ~1915 |
| Axel Peterson | Head | — | 65 | ~1865 |
| Francis Forrest | Other | — | 27 | ~1903 |
| Robert Peterson | Son | — | 11 | ~1919 |
| Mamie Peterson | Spouse | — | 45 | ~1885 |
Census Appearances
1920
Cowlitz, Washington
Son, age 1
Cowlitz, Washington · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Washington |
| Mother's Birthplace | Washington |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
Cowlitz, Washington
Son, age 11
Cowlitz, Washington · implied b. ~1919 — 6 household members
| Surname | Peterson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Washington |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
Cowlitz-County, Washington
Son, age 20
Cowlitz-County, Washington · implied b. ~1920 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Petersson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Olequa Precinct |
| Industry | 0 |
| Highest Grade | No 3 |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 Robert Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Axel Peterson (~0.92 confidence) and mother Mamie Peterson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Axel Peterson
b. ~1865
Source father
● Household
· direct · ~0.92
Mother
Mamie Peterson
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Peterson
Son · 1930 · age 11 · b. ~1919 · Washington
★ You are viewing this record
Sibling
Irene Peterson
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ina Peterson
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 — Cowlitz, Washington
Open full size
1930 US Federal Census — Cowlitz, Washington
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2487unit:0666)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Michael Boyd | 42 | Head | Laborer | Oregon |
| 2 | Emma Boyd | 39 | Wife | — | Washington |
| 3 | Howard Boyd | 9 | Son | — | Oregon |
| 4 | Benjamin Shephardson | 66 | Lodger | Farm Manager | Oregon |
| 5 | John Helman | 22 | Lodger | Laborer | Washington |
| 6 | Clum A Holten | 59 | Head | Farmer | Pennsylvania |
| 7 | Bertha Holten | 57 | Wife | — | Pennsylvania |
| 8 | Hazel Gregory | 34 | Daughter | Seamstress | Pennsylvania |
| 9 | Cloke Holten | 20 | Son | Rigger | Washington |
| 10 | J. O. Plomondon | 55 | Head | Wood Splitter | Washington |
| 11 | Isabella Plomondon | 42 | Wife | — | Washington |
| 12 | Frank Plomondon | 26 | Son | — | Washington |
| 13 | Ralph Plomondon | 24 | Son | Wood Splitter | Washington |
| 14 | Melvin Plomondon | 21 | Son | Choker-Setter | Washington |
| 15 | Elsie Plomondon | 18 | Daughter | — | Washington |
| 16 | Lucille Plomondon | 14 | Daughter | — | Washington |
| 17 | Louise Plomondon | 9 | Daughter | — | Washington |
| 18 | John Plomondon | 7 | Son | — | Washington |
| 19 | Laura Plomondon | 3 | Daughter | — | Washington |
| 20 | Axel Peterson | 65 | Head | Wood-Splitter | Sweden |
| 21 | Mamie Peterson | 45 | Wife | — | Washington |
| 22 | Ina A Peterson | 19 | Daughter | — | Washington |
| 23 | Irene Peterson | 15 | Daughter | — | Washington |
| 24 | Robert Peterson THIS PERSON | 11 | Son | — | Washington |
| 25 | Francis Forrest | 27 | Boarder | Woodsplitter | Washington |
| 26 | Ike Imbodem | 63 | Head | Farmer | Indiana |
| 27 | Gussie Imbodem | 57 | Wife | — | Wisconsin |
| 28 | Jean E Huntington | 35 | Head | Farmer | Washington |
| 29 | Margaret Huntington | 34 | Wife | — | Montana |
| 30 | Margaret Jean Huntington | 10 | Daughter | — | Oregon |
| 31 | Dalby Huntington | 8 | Son | — | Oregon |
| 32 | William Pumphrey | 65 | Boarder | Laborer | Virginia |
| 33 | Alice Mcgovern | 25 | Boarder | Teacher | Washington |
| 34 | A. M. Potts | 39 | Head | Operator | Washington |
| 35 | Mary Potts | 32 | Wife | — | Oregon |
| 36 | Mabel Potts | 10 | Son | — | Canada English |
| 37 | Rachel Potts | 7 | Daughter | — | Canada English |
| 38 | Richard Potts | 5 | Son | — | Washington |
| 39 | Geo Bertrand | 71 | Head | Proprietor | Canada French |
| 40 | Mary Bertrand | 70 | Wife | — | New York |
| 41 | Arthur H Pederson | 40 | Head | Collector | South Dakota |
| 42 | Bessie Pederson | 33 | Wife | Assistant Collector | Minnesota |
| 43 | Arthur Jr Pederson | 11 | Son | — | Oregon |
| 44 | Gloria Pederson | 7 | Daughter | — | Oregon |
| 45 | Robert Larson | 17 | Nephew | — | South Dakota |
| 46 | Mitchell King | 52 | Head | Farmer | Wisconsin |
| 47 | Mary King | 53 | Wife | — | Washington |
| 48 | Alvia Bouchard | 22 | Step Son | Choker-Setter | Washington |
| 49 | Clifford Theleous | 18 | Step Son | — | Washington |
| 50 | June Theleous | 12 | Step Daughter | — | Washington |
Pedigree Summary
Robert + 2 siblings
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)