IT
Isaac Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Caldwell-County, Texas
Our Model Tree links this Isaac Thomas across the 1920, 1930 and 1940 US Censuses in Caldwell-County, Texas (XGBoost, ~Confirmed), with identified parents D & Dee — first a son (b.~1913), then head of a 8-person household.
Age 27
b. ~1913
Male
Son
Born: Texas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Caldwell-County, Texas |
| Surname | Thomas |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Texas |
| 1935 Residence (City) | Precinct 4 |
| 1935 Residence (County) | Caldwell |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
| Township / Ward | Precinct 4 |
| Est. Birth Year | ~1913 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Annie Thomas | Daughter | — | 33 | ~1907 |
| Sarah Thomas | Other | — | 13 | ~1927 |
| Lula Thomas | Spouse | — | 62 | ~1878 |
| Bettie Thomas | Other | — | 11 | ~1929 |
| Jimmie Thomas | Son | — | 20 | ~1920 |
| Curtis Thomas | Son | — | 25 | ~1915 |
| Isaac Thomas | Son | — | 27 | ~1913 |
| A Thomas | Head | — | 62 | ~1878 |
Census Appearances
1920
Caldwell, Texas
Son, age 5
Caldwell, Texas · implied b. ~1915 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Mulatto |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Texas |
| Father's Birthplace | Texas |
| Mother's Birthplace | Texas |
| Occupation | none |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1930
Caldwell, Texas
Son, age 15
Caldwell, Texas · implied b. ~1915 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Texas |
| Father's Birthplace | Texas |
| Mother's Birthplace | Texas |
| Can Read/Write | Yes |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1940
Caldwell-County, Texas
Son, age 27
Caldwell-County, Texas · implied b. ~1913 — 8 household members
| Surname | Thomas |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Texas |
| 1935 Residence (City) | Precinct 4 |
| 1935 Residence (County) | Caldwell |
| Class of Worker | 0 |
| Highest Grade | 5 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
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 Isaac Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father D Thomas (~0.92 confidence) and father Dee Thomas (~0.92 confidence) and father A Thomas (~0.92 confidence) and mother Lula Thomas (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
D Thomas
b. ~1876
Source father
● Household
· direct · ~0.92
Father
Dee Thomas
b. ~1877
Source father
● Household
· direct · ~0.92
Father
A Thomas
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Lula Thomas
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Isaac Thomas
Son · 1940 · age 27 · b. ~1913 · Texas
★ You are viewing this record
Sibling
Jimmie Thomas
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Annie Thomas
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Curtis Thomas
Sibling · 1940 · age 25
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 — Caldwell-County, Texas
Open full size
1940 US Federal Census — Caldwell-County, Texas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03996-00585)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | W. C. Flowers | 49 | Head | Farmer | Texas |
| 42 | Beulah Flowers | 42 | Wife | — | Texas |
| 43 | Rilla Bell Flowers | 14 | Daughter | — | Texas |
| 44 | Rollie Jean Flowers | 10 | Son | — | Texas |
| 45 | Georgia Smith | 57 | Head | — | Texas |
| 46 | Nola League | 48 | Head | — | Texas |
| 47 | Albert Conley | 49 | Head | Farm | Texas |
| 48 | Lonie Conley | 39 | Wife | — | Texas |
| 49 | James H. Conley | 19 | Son | Farm Help | Texas |
| 50 | Ernest Conley | 17 | Son | Farm Help | Texas |
| 51 | Elenita Conley | 16 | Daughter | — | Texas |
| 52 | Louis Conley | 15 | Son | — | Texas |
| 53 | Melba J. Conley | 13 | Daughter | — | Texas |
| 54 | Della May Shaw | 15 | Daughter | — | Texas |
| 55 | Odie Shaw | 11 | Step-son | — | Texas |
| 56 | Orville Shaw | 10 | Step-son | — | Texas |
| 57 | Beulah Shaw | 8 | Step-daughter | — | Texas |
| 58 | Beulah Shaw | 5 | Step-daughter | — | Texas |
| 59 | Hardy M. Shaw | 3 | Step-son | — | Texas |
| 60 | Judson Owens | 39 | Head | Farmer | Texas |
| 61 | Lorena Owens | 35 | Wife | — | Texas |
| 62 | Jolene Owens | 15 | Daughter | — | Texas |
| 63 | S. D. Adair | 57 | Head | Stock & Farm | Texas |
| 64 | Lizzie Adair | 53 | Wife | — | Texas |
| 65 | Charlie R. Adair | 20 | Son | Farm Help | Texas |
| 66 | Edith D. Adair | 16 | Daughter | — | Texas |
| 67 | Martha Handley | 91 | Mother-in-law | — | Alabama |
| 68 | A. A. Nite | 41 | Head | Farmer | Texas |
| 69 | Lela Nite | 39 | Wife | — | Oklahoma |
| 70 | A. J. Thomas | 62 | Head | Farmer | Texas |
| 71 | Lula Thomas | 62 | Wife | — | Texas |
| 72 | Annie Thomas | 33 | Daughter | Cook | Texas |
| 73 | Isaac Thomas THIS PERSON | 27 | Son | — | Texas |
| 74 | Curtis Thomas | 25 | Son | — | Texas |
| 75 | Jimmie B. Thomas | 20 | Son | Farm Help | Texas |
| 76 | Sarah May Thomas | 13 | Grand-daughter | Servant | Texas |
| 77 | Bettie Ruth Thomas | 11 | Grand-daughter | — | Texas |
| 78 | Wm. D. Mcellison | 42 | Head | Common Labor | Texas |
| 79 | Lottie Ann Mcellison | 38 | Wife | — | Texas |
| 80 | Frank Mcellison | 16 | Son | Common Labor | Texas |
Related Census Records
Pedigree Summary
Isaac + 3 siblings
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)