RH
Robert Hamilton — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Oregon
Our Model Tree links this Robert Hamilton across the 1920, 1930 and 1940 US Censuses in Polk-County, Oregon (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1912), then head of a 3-person household.
Age 28
b. ~1912
Male
Son
Born: Tennessee
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Oregon |
| Surname | Hamilton |
| Given Name | Robert A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | McCoy precinct |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Farmer |
| Industry | General farming |
| Class of Worker | OA |
| Hours Worked | 65 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Farmer |
| Township / Ward | Mccoy Precinct |
| Est. Birth Year | ~1912 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| James Hamilton | Head | — | 67 | ~1873 |
| Robert Hamilton | Son | — | 28 | ~1912 |
| Amanda Hamilton | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Polk, Oregon
Son, age 10
Polk, Oregon · implied b. ~1910 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1930
Polk, Oregon
Son, age 19
Polk, Oregon · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Robert A. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Polk-County, Oregon
Son, age 28
Polk-County, Oregon · implied b. ~1912 — 3 household members
| Surname | Hamilton |
| Given Name | Robert A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | McCoy precinct |
| 1935 Residence (County) | Polk |
| Occupation | Farmer |
| Industry | General farming |
| Class of Worker | OA |
| Hours Worked | 65 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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 Hamilton across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Hamilton (~0.92 confidence) and father James Hamilton (~0.92 confidence) and mother Arminda Hamilton (~0.92 confidence) and mother Minda Hamilton (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Hamilton
b. ~1873
Source father
● Household
· direct · ~0.92
Father
James Hamilton
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Arminda Hamilton
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Minda Hamilton
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Hamilton
Son · 1940 · age 28 · b. ~1912 · Oregon
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Polk-County, Oregon
Open full size
1940 US Federal Census — Polk-County, Oregon
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03378-00374)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Christie D. Nielsen | 49 | Head | Farmer | Denmark |
| 2 | Elsie Nielsen | 46 | Wife | — | Oregon |
| 3 | Alice Nielsen | 11 | Daughter | — | Oregon |
| 4 | Soren Nielsen | 9 | Son | — | Oregon |
| 5 | Christian Nielsen | 3 | Son | — | Oregon |
| 6 | Thomas A. Finstad | 29 | Head | Laborer | Tennessee |
| 7 | James G. Hamilton | 67 | Head | Farmer | Tennessee |
| 8 | Amanda Hamilton | 57 | Wife | — | Tennessee |
| 9 | Robert A. Hamilton THIS PERSON | 28 | Son | Farmer | Tennessee |
| 10 | Leo J. Bruyere | 31 | Head | Farmer | Oregon |
| 11 | Bernice Bruyere | 27 | Wife | — | North Dakota |
| 12 | Sally Bruyere | 5 | Daughter | — | Oregon |
| 13 | Stanley J. Simons | 57 | Head | Laborer | Wisconsin |
| 14 | Bertha Sizemore | 54 | Mother-in-law | House Keeper | Norway |
| 15 | Carl Sizemore | 36 | Brother-in-law | Laborer | North Dakota |
| 16 | — | None | — | — | — |
| 17 | A. B. Walt | 72 | Head | Farmer | Oregon |
| 18 | Eula Walt | 58 | Wife | — | Texas |
| 19 | A. E. Broadwell | 40 | Head | Truck Driver | Oregon |
| 20 | Ida Broadwell | 37 | Wife | — | Oregon |
| 21 | Muriel Broadwell | 14 | Daughter | — | Oregon |
| 22 | Elizabeth Broadwell | 12 | Daughter | — | Oregon |
| 23 | Jean Broadwell | 9 | Daughter | — | Oregon |
| 24 | Arlington Jr. Broadwell | 7 | Son | — | Oregon |
| 25 | Patricia Broadwell | 5 | Daughter | — | Oregon |
| 26 | Ronald Broadwell | 4 | Son | — | Oregon |
| 27 | Wayne Broadwell | 1 | Son | — | Oregon |
| 28 | Azra Delake | 46 | Head | Carpenter | Nebraska |
| 29 | Azra Delake | 57 | Wife | — | Missouri |
| 30 | Laurence Shelton | 14 | Grandson | — | Oregon |
| 31 | Mary Humphrey | 92 | Mother-in-law | — | Illinois |
| 32 | Minnie Mande | 5 | Lodger | — | — |
| 33 | Harry Mason | 35 | Head | Unskilled Labor | Nebraska |
| 34 | Marie Mason | 31 | Wife | — | Nebraska |
| 35 | Gwendolyn Mason | 8 | Daughter | — | Nebraska |
| 36 | Marlene Mason | 6 | Daughter | — | Nebraska |
| 37 | Fred Mires | 63 | Head | — | Texas |
| 38 | Eula Mires | 59 | Wife | — | Texas |
| 39 | Raymond Van Cleave | 32 | Head | Truck Driver | Nebraska |
| 40 | Elmira Van Cleave | 27 | Wife | — | South Dakota |
Pedigree Summary
Robert
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 1940 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)