RH
Robert Harper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Oregon
Our Model Tree links this Robert Harper across the 1920, 1930 and 1940 US Censuses in Marion-County, Oregon (XGBoost, ~Confirmed), with identified parents John & Ella — first a head (b.~1902), then head of a 4-person household.
Age 38
b. ~1902
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Oregon |
| Surname | Harper |
| Given Name | Robert M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Gervais |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Farm operator |
| Industry | own farm |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 450 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farm Operator |
| Township / Ward | Gervais |
| Est. Birth Year | ~1902 |
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 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Harper | Head | — | 38 | ~1902 |
| Elbert Killin | Other | — | 58 | ~1882 |
| Vera Harper | Spouse | — | 38 | ~1902 |
| Robert Harper | Son | — | 11 | ~1929 |
Census Appearances
1920
Marion, Oregon
Son, age 17
Marion, Oregon · implied b. ~1903 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | Robert M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Ohio |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Marion, Oregon
Head, age 28
Marion, Oregon · implied b. ~1902 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | Robert M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 21 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Ohio |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Marion-County, Oregon
Head, age 38
Marion-County, Oregon · implied b. ~1902 — 4 household members
| Surname | Harper |
| Given Name | Robert M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Gervais |
| 1935 Residence (County) | Marion |
| Occupation | Farm operator |
| Industry | own farm |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 450 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Harper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Harper (~0.92 confidence) and mother Ella Harper (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Harper
b. ~1863
Source father
● Household
· direct · ~0.92
Mother
Ella Harper
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Harper
Head · 1940 · age 38 · b. ~1902 · 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 — Marion-County, Oregon
Open full size
1940 US Federal Census — Marion-County, Oregon
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03373-00244)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert M. Harper THIS PERSON | 38 | Head | Farm Operator | Iowa |
| 42 | Vera P. Harper | 38 | Wife | — | Wisconsin |
| 43 | Robert Warren Harper | 11 | Son | — | Oregon |
| 44 | Elbert Killin | 58 | Lodger | Farm Laborer | Oregon |
| 45 | Lee Smith | 57 | Head | Farm Laborer | Indiana |
| 46 | Audrey Smith | 52 | Wife | — | Indiana |
| 47 | C. Ernest Smith | 21 | Son | Farm Laborer | South Dakota |
| 48 | Maxine Smith | 15 | Daughter | — | South Dakota |
| 49 | Marjorie Niesen | 32 | Daughter | Primary Teacher | South Dakota |
| 50 | Beverly Niesen | 15 | Granddaughter | — | South Dakota |
| 51 | Elwood Smith | 24 | Son | Wheelbarrow | South Dakota |
| 52 | Beulah Smith | 21 | Daughter-in-law | — | South Dakota |
| 53 | Claudette Smith | 4 | Granddaughter | — | South Dakota |
| 54 | Merry Lee Smith | 1 | Granddaughter | — | Oregon |
| 55 | George Ritchey | 75 | Head | Farm Operator | Oregon |
| 56 | Rosa Ritchey | 63 | Wife | — | California |
| 57 | Harvey Ritchey | 42 | Son | Farm Laborer | Oregon |
| 58 | Henry Ritchey | 80 | Brother | — | Oregon |
| 59 | Louis E. Cutforth | 66 | Head | — | Wisconsin |
| 60 | Catherine Cutforth | 62 | Wife | — | Wisconsin |
| 61 | Ipha G. Smith | 83 | Head | — | Oregon |
| 62 | Nellie Smith | 62 | Daughter | — | Oregon |
| 63 | Kittie Smith | 60 | Daughter | — | Oregon |
| 64 | Wenzel Eder | 49 | Head | Farm Operator | Oregon |
| 65 | Flora Eder | 45 | Wife | — | Oregon |
| 66 | Emma Eder | 21 | Daughter | Piece Worker | Oregon |
| 67 | Norbert Eder | 18 | Son | Farm Laborer | Oregon |
| 68 | Gertrude Eder | 15 | Daughter | — | Oregon |
| 69 | Irene Eder | 11 | Daughter | — | Oregon |
| 70 | Frank Eder | 54 | Head | Farm Laborer | Oregon |
| 71 | Mary Eder | 53 | Wife | — | Oregon |
| 72 | Clarence Eder | 26 | Son | Farm Laborer | Oregon |
| 73 | Lawrence Eder | 22 | Son | Farm Laborer | Oregon |
| 74 | Rita Eder | 17 | Daughter | — | Oregon |
| 75 | F. N. Arnet | 53 | Head | Farmer, Livestock | Michigan |
| 76 | Margaret Mcmurem | 28 | Head | Waitress | Oregon |
| 77 | Leo Schwab | 47 | Head | Farm Operator | Oregon |
| 78 | Carl Schwab | 23 | Son | — | Oregon |
| 79 | Frank Adelman | 60 | Head | Farm Operator | Romania |
| 80 | Lena Adelman | 58 | Wife | — | Oregon |
Pedigree Summary
Robert
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 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)