RT
Robert Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mason-County, Kentucky
Our Model Tree links this Robert Thomas across the 1920, 1930 and 1940 US Censuses in Mason-County, Kentucky (XGBoost, ~Confirmed), with identified parents Alonzo & Claude — first a head (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Male
Head
Born: Kentucky
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mason-County, Kentucky |
| Surname | Thomas |
| Given Name | Robert |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (County) | Mason |
| Additional Details | |
| Occupation | bicycle factory |
| Industry | PW |
| Class of Worker | 1040 |
| Highest Grade | No 4 |
| 1935 Residence | 42 |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
| Occupation | Bicycle Factory |
| Township / Ward | Eastland |
| Est. Birth Year | ~1917 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Mary Thomas | Daughter | — | 5 | ~1935 |
| Robert Thomas | Head | — | 23 | ~1917 |
| Edward Thomas | Son | — | 5 | ~1935 |
| Theodosia Thomas | Spouse | — | 21 | ~1919 |
Census Appearances
1920
Fayette, Kentucky
Son, age 2
Fayette, Kentucky · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1930
Mason, Kentucky
Son, age 12
Mason, Kentucky · implied b. ~1918 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Kentucky |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Kentucky |
| Birth Country | United States |
| Birthplace (normalized) | kentucky |
1940
Mason-County, Kentucky
Head, age 23
Mason-County, Kentucky · implied b. ~1917 — 4 household members
| Surname | Thomas |
| Given Name | Robert |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Kentucky |
| 1935 Residence (County) | Mason |
| Occupation | bicycle factory |
| Industry | PW |
| Class of Worker | 1040 |
| Highest Grade | No 4 |
| 1935 Residence | 42 |
| 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 Robert Thomas across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Alonzo Thomas (~0.92 confidence) and father Claude Thomas (~0.92 confidence) and mother Sallie Thomas (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alonzo Thomas
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Claude Thomas
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Sallie Thomas
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Thomas
Head · 1940 · age 23 · b. ~1917 · 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 — Mason-County, Kentucky
Open full size
1940 US Federal Census — Mason-County, Kentucky
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01340-00517)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Janice R Crit. | 3 | daughter | — | Kentucky |
| 42 | Millard Thomas | 28 | head | Can Factory | Kentucky |
| 43 | Mary Thomas | 25 | wife | — | Kentucky |
| 44 | Ruby Thomas | 10 | daughter | — | Kentucky |
| 45 | Winslow Thomas | 7 | son | — | Kentucky |
| 46 | Iris Thomas | 3 | daughter | — | Kentucky |
| 47 | Emma K. Webster | 72 | mother in law | — | Kentucky |
| 48 | Carlos Weaver | 50 | head | — | Kentucky |
| 49 | Lelia Weaver | 48 | wife | — | Kentucky |
| 50 | Woodrow Weaver | 22 | son | Can Factory | Kentucky |
| 51 | Ludwig Weaver | 20 | son | Can Factory | Kentucky |
| 52 | Georgia Weaver | 18 | daughter | Factory | Kentucky |
| 53 | Juanita Weaver | 15 | daughter | — | Kentucky |
| 54 | Arvid Weaver | 11 | son | — | Kentucky |
| 55 | Lewis Weaver | 11 | son | — | Kentucky |
| 56 | Arthur Lawrence | 46 | head | Oil Co | Kentucky |
| 57 | Pauline Daly | 33 | housekeeper | Servant | Kentucky |
| 58 | Edith Daly | 13 | daughter | — | Kentucky |
| 59 | Clifford Daly | 9 | son | — | Kentucky |
| 60 | Martha Daly | 7 | daughter | — | Kentucky |
| 61 | Cecil Brubaker | 35 | head | Assist Sec. Treas | Kentucky |
| 62 | Grace Brubaker | 31 | wife | — | Kentucky |
| 63 | Nancye Kay Brubaker | 1 | daughter | — | Kentucky |
| 64 | Kenny Corby | 50 | head | Road Work | Kentucky |
| 65 | Mary Corby | 33 | wife | At Home | Kentucky |
| 66 | Mary R Corby | 13 | daughter | — | Kentucky |
| 67 | Robert Thomas THIS PERSON | 23 | head | Bicycle Factory | Kentucky |
| 68 | Theodosia Thomas | 21 | wife | Bicycle Factory | Kentucky |
| 69 | Mary Ann Thomas | 5 | daughter | — | Kentucky |
| 70 | Edward Thomas | 5 | son | — | Kentucky |
| 71 | Oscar Nash | 71 | head | Storage House | Kentucky |
| 72 | Minnie Nash | 69 | wife | — | Kentucky |
| 73 | Mort Humphries | 60 | head | Brick Yard | Kentucky |
| 74 | Ella Humphries | 50 | wife | — | Kentucky |
| 75 | Lillie Wise | 23 | step daughter | Laundry | Kentucky |
| 76 | George Wise | 21 | step son | Brick Yard | Kentucky |
| 77 | Juanita Humphries | 13 | daughter | — | Kentucky |
| 78 | Agnes Humphries | 10 | daughter | — | Kentucky |
| 79 | Albert Bocock | 60 | head | Mechanic | Virginia |
Pedigree Summary
Robert
Gen 1 · 3 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)