DC
David Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this David Campbell across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a son (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Campbell |
| Given Name | David W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Dormont borough |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Attendant |
| Industry | Filling Station |
| Class of Worker | PW |
| Hours Worked | 0 |
| Income (1939) | 500 |
| Highest Grade | C-3 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Attendant |
| Township / Ward | Dormont Borough |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| Pearl Campbell | Spouse | — | 55 | ~1885 |
| Charles Campbell | Head | — | 58 | ~1882 |
| David Campbell | Son | — | 21 | ~1919 |
| Donald Campbell | Son | — | 18 | ~1922 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 1
Allegheny, Pennsylvania · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | David W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 11
Allegheny, Pennsylvania · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 21
Allegheny-County, Pennsylvania · implied b. ~1919 — 4 household members
| Surname | Campbell |
| Given Name | David W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Dormont borough |
| 1935 Residence (County) | Allegheny |
| Occupation | Attendant |
| Industry | Filling Station |
| Class of Worker | PW |
| Hours Worked | 0 |
| Income (1939) | 500 |
| Highest Grade | C-3 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 David Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Campbell (~0.92 confidence) and father Charles Campbell (~0.92 confidence) and father Chas Campbell (~0.92 confidence) and mother Pearl Campbell (~0.92 confidence) and mother Pearl Campbell (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Campbell
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Charles Campbell
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Chas Campbell
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Pearl Campbell
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Pearl Campbell
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
David Campbell
Son · 1940 · age 21 · b. ~1919 · Pennsylvania
★ You are viewing this record
Sibling
Donald Campbell
Sibling · 1940 · age 18
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03401-00697)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Grace Cramer | 53 | Head | Teacher | Ohio |
| 2 | Linnie Boyd | 64 | Cousin | — | Pennsylvania |
| 3 | Elsie Rose Beck | 48 | Head | Secretary | Pennsylvania |
| 4 | Charles F. Meyers | 56 | Head | Civil Engineer | New York |
| 5 | Velma Meyers | 53 | Wife | — | Indiana |
| 6 | Betty Jane Meyers | 21 | Daughter | Clerk | Cleveland |
| 7 | Lloyd C. Anderson | 50 | Roomer | — | Pennsylvania |
| 8 | Richard L. Creighton | 23 | Lodger | Social Worker | Pennsylvania |
| 9 | Virginia Creighton | 21 | Wife | Social Worker | Pennsylvania |
| 10 | Charles Johnston | 60 | Head | Physician | Pennsylvania |
| 11 | Fannie Johnston | 60 | Wife | — | Pennsylvania |
| 12 | Robert M. Johnston | 32 | Son | Dentist | Pennsylvania |
| 13 | A. Gordon Johnston | 23 | Son | Clerk | Pennsylvania |
| 14 | Agnes Neman | 24 | Maid | Servant | Pennsylvania |
| 15 | Charles Campbell | 58 | Head | Executive | Pennsylvania |
| 16 | Pearl Campbell | 55 | Wife | — | Pennsylvania |
| 17 | David W. Campbell THIS PERSON | 21 | Son | Attendant | Pennsylvania |
| 18 | Donald W. Campbell | 18 | Son | — | Pennsylvania |
| 19 | H. Richard Deemer | 26 | Head | Draftsman | Pennsylvania |
| 20 | Marian Deemer | 22 | Wife | Stenographer | Pennsylvania |
| 21 | Guy Foster | 46 | Lodger | Salesman | Pennsylvania |
| 22 | Charles Konig | 23 | Lodger | Clerk | Ohio |
| 23 | Alda J. Brown | 55 | Head | — | Pennsylvania |
| 24 | Jaylav D. Salajner | 32 | Son | Salesman | Pennsylvania |
| 25 | Olive M. Brown | 30 | Step-daughter | Clerk | Pennsylvania |
| 26 | Samuel Shannon | 33 | Lodger | Salesman | Pennsylvania |
| 27 | John Vonezier | 42 | Head | Salesman | Illinois |
| 28 | Louise Vonezier | 40 | Wife | — | Illinois |
| 29 | Gloria Vonezier | 10 | Daughter | — | Illinois |
| 30 | Calvin R. Stauch | 44 | Head | Salesman | Pennsylvania |
| 31 | Nelle S. Stauch | 44 | Wife | Buyer | Pennsylvania |
| 32 | Martha Stauch | 5 | Daughter | — | Pennsylvania |
| 33 | Hazel Shimell | 28 | Maid | Servant | Pennsylvania |
| 34 | A. Bert Brown | 58 | Head | Salesman | Pennsylvania |
| 35 | Eva H. Brown | 57 | Wife | Teacher | Pennsylvania |
| 36 | G. Neil Brown | 23 | Son | Truck Driver | Pennsylvania |
| 37 | Harry F. Brooks | 33 | Head | Clerk | Pennsylvania |
| 38 | Teresa Brooks | 29 | Wife | — | Pennsylvania |
| 39 | Harry Brooks | 8 | Son | — | Pennsylvania |
| 40 | Helen Brooks | 12 | Daughter | — | Pennsylvania |
Pedigree Summary
David + 1 sibling
Gen 1 · 5 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)