RC
Robert Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Brown-County, Ohio
Our Model Tree links this Robert Campbell across the 1920, 1930 and 1940 US Censuses in Brown-County, Ohio (XGBoost, ~Confirmed), with identified parents John & Etna — first a son (b.~1919), then head of a 5-person household.
Age 21
b. ~1919
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Brown-County, Ohio |
| Surname | Campbell |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Sterling tp |
| 1935 Residence (County) | Brown |
| Additional Details | |
| Occupation | laborer |
| Industry | N.Y.A. road project |
| Class of Worker | GW |
| Hours Worked | 83 |
| Income (1939) | 188 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Laborer |
| Township / Ward | Sterling Tp |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Leah Campbell | Daughter | — | 33 | ~1907 |
| John Campbell | Head | — | 60 | ~1880 |
| Robert Campbell | Son | — | 21 | ~1919 |
| Vernon Campbell | Son | — | 28 | ~1912 |
| Clyde Campbell | Son | — | 26 | ~1914 |
Census Appearances
1920
Brown, Ohio
Son, age 1
Brown, Ohio · implied b. ~1919 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Brown, Ohio
Son, age 11
Brown, Ohio · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Brown-County, Ohio
Son, age 21
Brown-County, Ohio · implied b. ~1919 — 5 household members
| Surname | Campbell |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Sterling tp |
| 1935 Residence (County) | Brown |
| Occupation | laborer |
| Industry | N.Y.A. road project |
| Class of Worker | GW |
| Hours Worked | 83 |
| Income (1939) | 188 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Campbell (~0.92 confidence) and mother Etna Campbell (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Campbell
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Etna Campbell
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Campbell
Son · 1940 · age 21 · b. ~1919 · Ohio
★ You are viewing this record
Sibling
Vernon Campbell
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clyde Campbell
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leah Campbell
Sibling · 1940 · age 33
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 — Brown-County, Ohio
Open full size
1940 US Federal Census — Brown-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03031-00489)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lovell Atkins | 46 | Head | Farming | Ohio |
| 2 | Inez Atkins | 45 | Wife | — | Ohio |
| 3 | Rebecca Atkins | 17 | Daughter | — | Ohio |
| 4 | Louis Liernan | 69 | Boarder | — | Ohio |
| 5 | Vernon J. Schwallie | 47 | Head | Proprietor | Ohio |
| 6 | Lavon Schwallie | 38 | Wife | — | Ohio |
| 7 | Vernon J. Jr. Schwallie | 18 | Son | Clerk | Ohio |
| 8 | James M. Schwallie | 15 | Son | — | Ohio |
| 9 | Jo Ann Schwallie | 3 | Daughter | — | Ohio |
| 10 | Arthur Robinson | 33 | Head | Farming | Ohio |
| 11 | Lucretia Robinson | 31 | Wife | — | Ohio |
| 12 | Mary Anna Robinson | 10 | Daughter | — | Ohio |
| 13 | Clarence W. Miller | 44 | Head | Farming | Ohio |
| 14 | Mary Leona Miller | 45 | Wife | — | Ohio |
| 15 | Willis M. Miller | 11 | Son | — | Ohio |
| 16 | Wilmer G. Miller | 7 | Son | — | Ohio |
| 17 | Charles R. Miller | 46 | Head | Farming | Ohio |
| 18 | Estellene Miller | 44 | Wife | — | Ohio |
| 19 | Clair Miller | 20 | Son | Billing Clerk | Ohio |
| 20 | Jeanette Miller | 18 | Daughter | Office Work | Ohio |
| 21 | Donald Miller | 16 | Son | — | Ohio |
| 22 | William H. Wilson | 73 | Head | — | Ohio |
| 23 | Katie Wilson | 71 | Wife | — | Ohio |
| 24 | Elizabeth Morgan | 72 | Head | — | Ohio |
| 25 | Ada Mae Mcsheby | 11 | Daughter | — | Ohio |
| 26 | Emma Belle Mcsheby | 10 | Daughter | — | Ohio |
| 27 | Ignatius L. Zollars | 56 | Head | — | Ohio |
| 28 | Fannie Zollars | 61 | Wife | — | Ohio |
| 29 | James A. Zollars | 21 | Head | Farming | Ohio |
| 30 | Ruby Zollars | 22 | Wife | — | Ohio |
| 31 | Richard Zollars | 2 | Son | — | Ohio |
| 32 | Charles Thomas Zollars | 0 | Son | — | Ohio |
| 33 | John H. Campbell | 60 | Head | — | Ohio |
| 34 | Leah Campbell | 33 | Daughter | — | Ohio |
| 35 | Vernon Campbell | 28 | Son | Farming | Ohio |
| 36 | Clyde Campbell | 26 | Son | Farming | Ohio |
| 37 | Robert Campbell THIS PERSON | 21 | Son | Laborer | Ohio |
| 38 | Charles W. Zollars | 80 | Head | — | Ohio |
| 39 | Nettie Zollars | 77 | Wife | — | Ohio |
| 40 | Alfred E. Verwold | 44 | Head | Farming | Ohio |
Pedigree Summary
Robert + 3 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 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)