CT
Clarence Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Clarence Thomas across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Martha & Richard — first a son (b.~1916), then head of a 5-person household.
Age 24
b. ~1916
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Thomas |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Janitor |
| Industry | Appartment |
| Class of Worker | PW |
| Hours Worked | 70 |
| Income (1939) | 780 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Janitor |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1916 |
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 Clarence | Age | Birth yr |
|---|---|---|---|---|
| Geraldine Thomas | Daughter | — | 18 | ~1922 |
| Dorothy Thomas | Daughter | — | 23 | ~1917 |
| Richard Thomas | Head | — | 58 | ~1882 |
| Clarence Thomas | Son | — | 24 | ~1916 |
| Martha Thomas | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 2
Allegheny, Pennsylvania · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Clarence E Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Wales |
| Mother Tongue | Welch |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 13
Allegheny, Pennsylvania · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Wales |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 24
Allegheny-County, Pennsylvania · implied b. ~1916 — 5 household members
| Surname | Thomas |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Janitor |
| Industry | Appartment |
| Class of Worker | PW |
| Hours Worked | 70 |
| Income (1939) | 780 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| 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 Clarence Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Martha Thomas (~0.92 confidence) and father Richard Thomas (~0.92 confidence) and father Owens Thomas (~0.92 confidence) and mother Evaline Thomas (~0.92 confidence) and father Clarence Thomas (~0.92 confidence) and mother Darline Thomas (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Martha Thomas
b. ~1880
Source mother
● Household
· direct · ~0.92
Father
Richard Thomas
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Owens Thomas
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Evaline Thomas
b. ~1893
Source mother
● Household
· direct · ~0.92
Father
Clarence Thomas
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Darline Thomas
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Clarence Thomas
Son · 1940 · age 24 · b. ~1916 · Pennsylvania
★ You are viewing this record
Sibling
Geraldine Thomas
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Thomas
Sibling · 1940 · age 23
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-t0627-03660-00239)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Emanuel De Natale | 12 | Son | — | Pennsylvania |
| 42 | Amelia De Natale | 10 | daughter | — | Pennsylvania |
| 43 | Gloria De Natale | 8 | daughter | — | Pennsylvania |
| 44 | William De Natale | 3 | Son | — | Pennsylvania |
| 45 | Frank Sancosti | 63 | Head | Artist | Italy |
| 46 | Concetta Sancosti | 54 | Wife | — | Italy |
| 47 | Livia Sancosti | 30 | daughter | Presser | Pennsylvania |
| 48 | Dario Sancosti | 25 | Son | Painter | Pennsylvania |
| 49 | Angeline Sancosti | 25 | daughter | — | Pennsylvania |
| 50 | Mario Sancosti | 21 | Son | Labor | Pennsylvania |
| 51 | Virginia Sancosti | 18 | daughter-in-law | — | West Virginia |
| 52 | Arthur Sancosti | 18 | Son | Forestry | Pennsylvania |
| 53 | Alba Sancosti | 15 | daughter | — | Pennsylvania |
| 54 | Francis Sancosti | 1 | Grand-son | — | Pennsylvania |
| 55 | John Peters | 32 | Head | Truck Driver | Pennsylvania |
| 56 | Eydellie Peters | 28 | Wife | — | Pennsylvania |
| 57 | Ruth H. Peters | 9 | daughter | — | Pennsylvania |
| 58 | George C. Peters | 8 | Son | — | Pennsylvania |
| 59 | J. William Peters | 7 | Son | — | Pennsylvania |
| 60 | William F. Peters | 65 | Head | Laborer | Germany |
| 61 | Mary C. Peters | 69 | Wife | — | Germany |
| 62 | Richard A. Thomas | 58 | Head | Heveman | Maryland |
| 63 | Martha Thomas | 60 | Wife | — | North Carolina |
| 64 | Clarence Thomas THIS PERSON | 24 | Son | Janitor | Pennsylvania |
| 65 | Dorothy Thomas | 23 | daughter | Maid | Pennsylvania |
| 66 | Geraldine Thomas | 18 | daughter | New Worker | Pennsylvania |
| 67 | Michael G. Feldmeier | 39 | Head | Laborer | Pennsylvania |
| 68 | Mary Feldmeier | 39 | Wife | — | Pennsylvania |
| 69 | Michael L. Feldmeier | 15 | Son | — | Pennsylvania |
| 70 | John J. Feldmeier | 14 | Son | — | Pennsylvania |
| 71 | Ann Marie Feldmeier | 13 | daughter | — | Pennsylvania |
| 72 | Charles F. Klein | 42 | Head | Auto Mechanic | Pennsylvania |
| 73 | Genevieve Klein | 41 | Wife | — | Pennsylvania |
| 74 | Edward M. Palmer | 79 | Head | — | Pennsylvania |
| 75 | Sarah Palmer | 73 | Wife | — | Pennsylvania |
| 76 | Lillian Palmer | 52 | daughter | — | Pennsylvania |
| 77 | Paul Palmer | 45 | Son | Baker | Pennsylvania |
| 78 | Joseph E. Palmer | 37 | Son | Baker | Pennsylvania |
| 79 | Peter J. Ditte | 32 | Head | Asst. Foreman | Pennsylvania |
| 80 | Flora A. Ditte | 25 | Wife | — | Pennsylvania |
Pedigree Summary
Clarence + 2 siblings
Gen 1 · 6 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)