JC
John Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Louis-County, Missouri
Our Model Tree links this John Campbell across the 1920, 1930 and 1940 US Censuses in St.-Louis-County, Missouri (XGBoost, ~Confirmed), with identified parents Clyde & M — first a son (b.~1912), then head of a 7-person household.
Age 28
b. ~1912
Male
Son
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Missouri |
| Surname | Campbell |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Clayton City |
| 1935 Residence (County) | Saint Louis |
| Additional Details | |
| Occupation | Architect |
| Industry | Own Office |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | C-4 |
| 1935 Residence | Same House |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Architect |
| Township / Ward | Clayton City |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Campbell | Daughter | — | 23 | ~1917 |
| Roy Campbell | Head | — | 56 | ~1884 |
| Frances Behymei | Other | — | 27 | ~1913 |
| Roy Campbell | Son | — | 21 | ~1919 |
| John Campbell | Son | — | 28 | ~1912 |
| Clyde Behymei | Spouse | — | 28 | ~1912 |
| Clara Campbell | Spouse | — | 54 | ~1886 |
Census Appearances
1920
St Louis, …
Son, age 8
St Louis, Missouri · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
St Louis, …
Son, age 18
St Louis, Missouri · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-County, Missouri
Son, age 28
St.-Louis-County, Missouri · implied b. ~1912 — 7 household members
| Surname | Campbell |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Clayton City |
| 1935 Residence (County) | Saint Louis |
| Occupation | Architect |
| Industry | Own Office |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | C-4 |
| 1935 Residence | Same House |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 John Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Clyde Behymei (~0.50 confidence) and father M Behymes (~0.46 confidence) and father Ray Campbell (~0.92 confidence) and father John Campbell (~0.92 confidence) and mother Clara Campbell (~0.92 confidence) and mother Rosalind Campbell (~0.92 confidence). The pedigree spans 2 generations with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.77
Father
Clyde Behymei
b. ~1912
Source father
● Household
· direct · ~0.5
Father
M Behymes
b. ~1861
Source father>father
● Household
· direct · ~0.46
Father
Ray Campbell
b. ~1884
Source father
● Household
· direct · ~0.92
Father
John Campbell
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Clara Campbell
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Rosalind Campbell
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Campbell
Son · 1940 · age 28 · b. ~1912 · Missouri
★ You are viewing this record
Sibling
Elizabeth Campbell
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roy Campbell
Sibling · 1940 · age 21
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 — St.-Louis-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02147-00816)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frances Mears | 43 | Wife | — | Kansas |
| 2 | James Mears | 12 | Son | — | Missouri |
| 3 | Joe T. Dickerson | 41 | Head | Lawyer | Kansas |
| 4 | Gretchen Dickerson | 34 | Wife | — | Ohio |
| 5 | Carolyn Dickerson | 9 | Daughter | — | Oklahoma |
| 6 | Nettie Hill | 27 | Maid | Maid | Oklahoma |
| 7 | Karl L. Nordyke | 39 | Head | Manager Of Sales | Louisiana |
| 8 | Florence Nordyke | 30 | Wife | — | Kentucky |
| 9 | Karl L. Jr. Nordyke | 4 | Son | — | Kentucky |
| 10 | Karl Krummenacher | 29 | Head | Druggist | Missouri |
| 11 | Florence Krummenacher | 25 | Wife | Dancing Teacher | Missouri |
| 12 | Gaila Krummenacher | 5 | Daughter | — | Missouri |
| 13 | Effie Valentine | 58 | Maid | Maid | Illinois |
| 14 | Walter G. Degelow | 49 | Head | Assistant General Freight Agent | Kansas |
| 15 | Hazel Degelow | 48 | Wife | — | Missouri |
| 16 | Nancy Degelow | 11 | Daughter | — | Missouri |
| 17 | Virginia Degelow | 8 | Daughter | — | Missouri |
| 18 | Roy A. Campbell | 56 | Head | President | Missouri |
| 19 | Clara A. Campbell | 54 | Wife | Shop Manager | Missouri |
| 20 | John A. Campbell THIS PERSON | 28 | Son | Architect | Missouri |
| 21 | Elizabeth A. Campbell | 23 | Daughter | — | Missouri |
| 22 | Roy Jr. Campbell | 21 | Son | Laboratory Assistant | Missouri |
| 23 | Frances Behymei | 27 | Maid | Maid | Missouri |
| 24 | Clyde Behymei | 28 | Husband | Painter | Illinois |
| 25 | Harry M. White | 50 | Head | Vice President | Missouri |
| 26 | Ferne White | 30 | Wife | — | Missouri |
| 27 | William P. Morgan | 46 | Head | Engineer & Draftsman | Illinois |
| 28 | Adele S. Morgan | 45 | Wife | — | Missouri |
| 29 | Thomas Morgan | 20 | Son | — | Missouri |
| 30 | Elmer Deicke | 43 | Head | Engineer | Missouri |
| 31 | Edna M. Deicke | 41 | Wife | — | Missouri |
| 32 | Georgia L. Deicke | 14 | Daughter | — | Missouri |
| 33 | June Deicke | 11 | Daughter | — | Missouri |
| 34 | L. Sturgis Day | 52 | Head | Real Estate Agent | Missouri |
| 35 | Alice Day | 37 | Wife | — | Missouri |
| 36 | Laurence Day | 6 | Son | — | Missouri |
| 37 | Stafford Clark | 23 | Nephew | — | New York |
| 38 | Line Extra | None | — | — | — |
| 39 | Joseph A. Falzone | 40 | Head | Lawyer | Missouri |
| 40 | Alberta Falzone | 35 | Wife | — | Missouri |
Pedigree Summary
John + 2 siblings
Gen 1 · 5 parents
~0.84
Gen 2 · 1 grandparents
~0.46
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)