JT
James Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kentucky
Our Model Tree links this James Thomas across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kentucky (XGBoost, ~Confirmed), with identified parents Bert & William — first a son (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Male
Son
Born: Kentucky
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kentucky |
| Surname | Thomas |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville city |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Chauffeur |
| Industry | Private home |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Chauffeur |
| Township / Ward | Louisville City |
| Est. Birth Year | ~1911 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Bert Thomas | Head | — | 52 | ~1888 |
| James Thomas | Son | — | 29 | ~1911 |
| Martha Thomas | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Jefferson, Kentucky
Son, age 10
Jefferson, Kentucky · implied b. ~1910 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Jefferson, Kentucky
Son, age 20
Jefferson, Kentucky · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Occupation | none |
| Can Read/Write | No |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Jefferson-County, Kentucky
Son, age 29
Jefferson-County, Kentucky · implied b. ~1911 — 3 household members
| Surname | Thomas |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Kentucky |
| 1935 Residence (City) | Louisville city |
| 1935 Residence (County) | Jefferson |
| Occupation | Chauffeur |
| Industry | Private home |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
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 James Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Bert Thomas (~0.92 confidence) and father William Thomas (~0.92 confidence) and mother Martha Thomas (~0.92 confidence) and mother Mary Thomas (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Bert Thomas
b. ~1888
Source father
● Household
· direct · ~0.92
Father
William Thomas
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Martha Thomas
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Mary Thomas
b. ~1871
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Thomas
Son · 1940 · age 29 · b. ~1911 · Kentucky
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Jefferson-County, Kentucky
Open full size
1940 US Federal Census — Jefferson-County, Kentucky
Page Contents
11 people indexed on this census page (nara:1940:m-t0627-01372-00153)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Parker | 74 | Head | — | Kentucky |
| 42 | Fannie Parker | 52 | Wife | Cook | Kentucky |
| 43 | Leroy Parker | 38 | Son | Car Washer | Kentucky |
| 44 | Annie M. Parker | 35 | Daughter-in-law | Cook | Michigan |
| 45 | Rena Smith | 75 | Sister | — | Kentucky |
| 46 | Clara Taylor | 45 | Sister | — | Kentucky |
| 48 | Robert Hunter | 46 | Head | Laborer | Kentucky |
| 49 | Delia Hunter | 46 | Wife | — | Kentucky |
| 50 | Bert Thomas | 52 | Head | Janitor | Kentucky |
| 51 | Martha Thomas | 50 | Wife | — | Kentucky |
| 52 | James Thomas THIS PERSON | 29 | Son | Chauffeur | Kentucky |
Related Census Records
Pedigree Summary
James
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)