WT
William Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Clair-County, Illinois
Our Model Tree links this William Thomas across the 1920, 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed), with identified parents James & Odie — first a son (b.~1920), then head of a 4-person household.
Age 20
b. ~1920
Male
Son
Born: Tennessee
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Illinois |
| Surname | Thomas |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Additional Details | |
| Occupation | Laborer |
| Industry | Penn. R.R. |
| Class of Worker | PW |
| Hours Worked | 8 |
| Income (1939) | 300 |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Laborer |
| Township / Ward | East St Louis |
| Est. Birth Year | ~1920 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Odie Thomas | Head | — | 42 | ~1898 |
| William Thomas | Son | — | 20 | ~1920 |
| Marvin Thomas | Son | — | 14 | ~1926 |
| Caroline Thomas | Spouse | — | 37 | ~1903 |
Census Appearances
1920
Haywood, Tennessee
Son, age
Haywood, Tennessee · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Willie J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
Son, age 10
St Clair, Illinois · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Willie |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Tennessee |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
St.-Clair-County, Illinois
Son, age 20
St.-Clair-County, Illinois · implied b. ~1920 — 4 household members
| Surname | Thomas |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Tennessee |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Occupation | Laborer |
| Industry | Penn. R.R. |
| Class of Worker | PW |
| Hours Worked | 8 |
| Income (1939) | 300 |
| Highest Grade | No 2 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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 William Thomas across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father James Thomas (~0.92 confidence) and father Odie Thomas (~0.92 confidence) and mother Anna Thomas (~0.92 confidence) and mother Caroline Thomas (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Thomas
b. ~1897
Source father
● Household
· direct · ~0.92
Father
Odie Thomas
b. ~1899
Source father
● Household
· direct · ~0.92
Mother
Anna Thomas
b. ~1899
Source mother
● Household
· direct · ~0.92
Mother
Caroline Thomas
b. ~1903
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Thomas
Son · 1940 · age 20 · b. ~1920 · Illinois
★ You are viewing this record
Sibling
Marvin Thomas
Sibling · 1940 · age 14
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.-Clair-County, Illinois
Open full size
1940 US Federal Census — St.-Clair-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00881-00337)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Vasta Gulley | 24 | Wife | — | Texas |
| 42 | Lee Pastorie Gulley | 3 | Son | — | Texas |
| 43 | Louie Orr | 33 | Head | Lawyer | N. Carolina |
| 44 | Goldie F. Orr | 29 | Wife | — | Indiana |
| 45 | Marjorie Orr | 2 | Daughter | — | Missouri |
| 46 | Arthur Benbo | 32 | Head | Laborer | Mississippi |
| 47 | Jessie L. Benbo | 28 | Wife | — | Tennessee |
| 48 | Charles Harris | 36 | Lodger | — | Mississippi |
| 49 | — | None | — | — | — |
| 50 | Ben Henry | 59 | Head | Laborer | Louisiana |
| 51 | Annette Henry | 50 | Wife | — | Tennessee |
| 52 | Loretta Henry | 15 | Daughter | — | Missouri |
| 53 | Evelyn Henry | 14 | Daughter | — | Missouri |
| 54 | Benjamin Henry | 9 | Son | — | Missouri |
| 55 | Melvin Stennis | 28 | Head | Laborer | Mississippi |
| 56 | Rosie Stennis | 26 | Wife | — | Alabama |
| 57 | Herman Bradford | 27 | Head | Operator | Illinois |
| 58 | Garden Elizabeth Bradford | 32 | Wife | — | Mississippi |
| 59 | Elvin Longmire | 15 | Son | — | Mississippi |
| 60 | Donald Cebrey | 3 | Son | — | Illinois |
| 61 | Jessie Lash | 36 | Sister | — | Mississippi |
| 62 | John Walker | 51 | Head | — | Mississippi |
| 63 | Love Walker | 44 | Wife | — | Illinois |
| 64 | Sam Davis | 45 | Head | Laborer | Mississippi |
| 65 | Rosetta Davis | 39 | Wife | — | Mississippi |
| 66 | Mildred D. Davis | 14 | Daughter | — | Illinois |
| 67 | Theresa Davis | 12 | Daughter | — | Illinois |
| 68 | Samuel L. Davis | 6 | Son | — | Illinois |
| 69 | Helen F. Davis | 4 | Daughter | — | Illinois |
| 70 | Oney Taylor | 44 | Head | Butcher | Tennessee |
| 71 | Josie Taylor | 39 | Wife | — | Mississippi |
| 72 | James Taylor | 3 | Son | — | Illinois |
| 73 | Margie Cebrey | 22 | Step-dau | Seamstress | Arkansas |
| 74 | Harold Cebrey | 8 | Son | — | Arkansas |
| 75 | Elizabeth Thomas | 73 | Head | — | Mississippi |
| 76 | Charlie Anderson | 45 | Lodger | Laborer | Mississippi |
| 77 | Odie Thomas | 42 | Head | Laborer | Tennessee |
| 78 | Caroline Thomas | 37 | Wife | — | Tennessee |
| 79 | William Thomas THIS PERSON | 20 | Son | Laborer | Tennessee |
| 80 | Marvin Thomas | 14 | Son | — | Illinois |
Related Census Records
Pedigree Summary
William + 1 sibling
Gen 1 · 4 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)