RC
Robert Chapman — 1940 US Census Record
Model Tree available1940 United States Federal Census · Multnomah-County, Oregon
Our Model Tree links this Robert Chapman across the 1920, 1930 and 1940 US Censuses in Multnomah-County, Oregon (XGBoost, ~Confirmed), with identified parents Grace & Robert — first a son (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Son
Born: Oregon
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Multnomah-County, Oregon |
| Surname | Chapman |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Portland City |
| 1935 Residence (County) | Multnomah |
| Additional Details | |
| Occupation | Apprentice Machinist |
| Industry | Automobile Mfg |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 404 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
| Occupation | Apprentice Machinist |
| Township / Ward | Portland City |
| Est. Birth Year | ~1918 |
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 |
|---|---|---|---|---|
| Grace Chapman | Head | — | 57 | ~1883 |
| Robert Chapman | Son | — | 22 | ~1918 |
| Eleanor Chapman | Daughter | — | 26 | ~1914 |
Census Appearances
1920
Multnomah, Oregon
Daughter, age 1
Multnomah, Oregon · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Robert Jr |
| Relationship to Head | Daughter |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Oregon |
| Mother's Birthplace | Washington |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1930
Multnomah, Oregon
Son, age 12
Multnomah, Oregon · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Robert D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Oregon |
| Mother's Birthplace | Washington |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1940
Multnomah-County, Oregon
Son, age 22
Multnomah-County, Oregon · implied b. ~1918 — 3 household members
| Surname | Chapman |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Portland City |
| 1935 Residence (County) | Multnomah |
| Occupation | Apprentice Machinist |
| Industry | Automobile Mfg |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 404 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
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 Chapman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Grace Chapman (~0.92 confidence) and father Robert Chapman (~0.92 confidence) and mother Grace Chapman (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Grace Chapman
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
Robert Chapman
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Grace Chapman
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Chapman
Son · 1940 · age 22 · b. ~1918 · Oregon
★ You are viewing this record
Sibling
Eleanor Chapman
Sibling · 1940 · age 26
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
1940 US Federal Census — Multnomah-County, Oregon
Open full size
1940 US Federal Census — Multnomah-County, Oregon
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03388-00500)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Isabelle Geisler | 53 | Wife | Saleswoman | Canada |
| 42 | Stella Beth Geisler | 21 | Daughter | Secretary | Oregon |
| 43 | Evelyn Bosch | 43 | Head | Seamstress | Indiana |
| 44 | Edna Ruth Bosch | 19 | Daughter | Housekeeping | Oregon |
| 45 | Robert Bosch | 17 | Son | Office Work | Oregon |
| 46 | Edward Keller | 58 | Head | Service Station Own | Iowa |
| 47 | Sadie Keller | 51 | Wife | Assistant | Iowa |
| 48 | Howard Keller | 17 | Son | Attendant | South Dakota |
| 49 | Harry Keller | 16 | Son | Attendant | South Dakota |
| 50 | Edith Keller | 12 | Daughter | — | South Dakota |
| 51 | Grace Chapman | 57 | Head | — | Washington |
| 52 | Eleanor Chapman | 26 | Daughter | Secretarial | Oregon |
| 53 | Robert Chapman THIS PERSON | 22 | Son | Apprentice Machinist | Oregon |
| 54 | Here Ends Block 229 And Begins Block 230 | None | — | — | — |
| 55 | Ray Goedeck | 29 | Head | Carpenter | California |
| 56 | Helen Goedeck | 25 | Wife | — | Oregon |
| 57 | Bernard U. Lewin | 52 | Head | Pipe Fitter Carpenter | California |
| 58 | Gertrude E. Lewin | 54 | Wife | Maid Servant | Nebraska |
| 59 | Dora Lundy | 45 | Head | Servant | Kansas |
| 60 | Anne Lundy | 25 | Daughter | Nurse | Oregon |
| 61 | Yvonne Lundy | 19 | Daughter | New Worker | Oregon |
| 62 | Paul Lundy | 17 | Son | Laborer | Oregon |
| 63 | Ruth Lundy | 15 | Daughter | New Worker | Oregon |
| 64 | Jonathan Lundy | 11 | Son | — | Oregon |
| 65 | Sherman Barney | 30 | Head | Painter Spray | Iowa |
| 66 | Rose Barney | 30 | Wife | — | Virginia |
| 67 | Frank Barney | 5 | Daughter | — | Oregon |
| 68 | Joan Barney | 3 | Daughter | — | Oregon |
| 69 | Janet Barney | 2 | Daughter | — | Oregon |
| 70 | Ella De Thitt | 52 | Head | Waitress | Wisconsin |
| 71 | Herbert De Thitt | 10 | Son | — | Oregon |
| 72 | Lester Bergstrom | 31 | Son-in-law | Uploader | Oregon |
| 73 | Alice Bergstrom | 23 | Daughter | Spinner | Oregon |
| 74 | Alvin Thomas | 66 | Head | — | Michigan |
| 75 | Lurie Thomas | 61 | Wife | — | Wisconsin |
| 76 | Roswell B. Peake | 42 | Head | Carpenter | Washington |
| 77 | Mable Peake | 40 | Wife | Floral | Washington |
| 78 | Donald Peake | 3 | Son | — | Oregon |
| 79 | Lee Singletery | 14 | Step-son | New Worker | Oregon |
| 80 | Maude E. Kay | 55 | Housekeeper | Housekeeper | Iowa |
Pedigree Summary
Robert + 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 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)