RT
Ralph Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Darke-County, Ohio
Our Model Tree links this Ralph Thomas across the 1920, 1930 and 1940 US Censuses in Darke-County, Ohio (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a son (b.~1915), then head of a 3-person household.
Age 25
b. ~1915
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Darke-County, Ohio |
| Surname | Thomas |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | MONROE TOWNSHIP |
| 1935 Residence (County) | DARKE |
| Additional Details | |
| Occupation | Farm Laborer |
| Industry | At home |
| Class of Worker | NP |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Farm Laborer |
| Township / Ward | Monroe Township |
| Est. Birth Year | ~1915 |
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 Ralph | Age | Birth yr |
|---|---|---|---|---|
| Agnes Thomas | Spouse | — | 50 | ~1890 |
| Ralph Thomas | Son | — | 25 | ~1915 |
| Charles Thomas | Head | — | 54 | ~1886 |
Census Appearances
1920
Darke, Ohio
Son, age 4
Darke, Ohio · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Darke, Ohio
Son, age 14
Darke, Ohio · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Darke-County, Ohio
Son, age 25
Darke-County, Ohio · implied b. ~1915 — 3 household members
| Surname | Thomas |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | MONROE TOWNSHIP |
| 1935 Residence (County) | DARKE |
| Occupation | Farm Laborer |
| Industry | At home |
| Class of Worker | NP |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Ralph Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Thomas (~0.92 confidence) and father Charles Thomas (~0.92 confidence) and father Charles Thomas (~0.92 confidence) and mother Agnes Thomas (~0.92 confidence) and mother Agnes Thomas (~0.92 confidence) and mother Laura Thomas (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Thomas
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Charles Thomas
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Charles Thomas
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Agnes Thomas
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Agnes Thomas
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Laura Thomas
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ralph Thomas
Son · 1940 · age 25 · b. ~1915 · Ohio
★ 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 — Darke-County, Ohio
Open full size
1940 US Federal Census — Darke-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03060-00771)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Zena Henninger | 50 | Wife | Housework | Ohio |
| 42 | Hazel Henninger | 19 | Daughter | Waitress | Ohio |
| 43 | Gladys Henninger | 14 | Daughter | Waitress | Ohio |
| 44 | Homer Henninger | 12 | Son | — | Ohio |
| 45 | Claude Pittman | 53 | Roomer | Farm Labor | Ohio |
| 46 | Elmer Smeyer | 47 | Head | Farmer | Ohio |
| 47 | Clara-May Smeyer | 44 | Wife | Housework | Ohio |
| 48 | Thurston Smeyer | 22 | Son | Farm Laborer | Ohio |
| 49 | Emil Smeyer | 18 | Son | Farm Laborer | Ohio |
| 50 | Irvin Aukerman | 49 | Head | Farmer | Ohio |
| 51 | Alice Aukerman | 46 | Wife | Housework | Ohio |
| 52 | Glen Aukerman | 18 | Son | Farm Laborer | Ohio |
| 53 | Jesse Arnett | 48 | Head | Farmer | Ohio |
| 54 | Clara Arnett | 43 | Wife | Housework | Ohio |
| 55 | Russel Arnett | 24 | Son | Automobile Mechanic | Ohio |
| 56 | Leonard Dickey | 25 | Head | Farmer | Ohio |
| 57 | Alice Dickey | 25 | Wife | Housework | Ohio |
| 58 | Aubrey Younce | 33 | Head | Farmer | Ohio |
| 59 | Mabel Younce | 29 | Wife | Housework | Ohio |
| 60 | Mary Beth Younce | 6 | Daughter | — | Ohio |
| 61 | James A. Stephens | 72 | Head | Farmer | Ohio |
| 62 | Mamie Stephens | 33 | Daughter | Housework | Ohio |
| 63 | Frank S. Marole | 47 | Head | Farmer | Ohio |
| 64 | Hazel Marole | 43 | Wife | Housework | Ohio |
| 65 | Charles A. Thomas | 54 | Head | Farmer | Ohio |
| 66 | Agnes Thomas | 50 | Wife | Housework | Ohio |
| 67 | Ralph Thomas THIS PERSON | 25 | Son | Farm Laborer | Ohio |
| 68 | Ivan Kress | 54 | Head | Farmer | Ohio |
| 69 | Elsie Kress | 51 | Wife | Housework | Ohio |
| 70 | Dewain Kress | 17 | Son | Farm Laborer | Ohio |
| 71 | Delores Kress | 14 | Daughter | Housework | Ohio |
| 72 | Earl Kress | 61 | Head | Farmer | Ohio |
| 73 | Lenna Kress | 44 | Wife | Housework | Ohio |
| 74 | Elden Kress | 29 | Son | Farmer | Ohio |
| 75 | Kenneth Kress | 17 | Son | New Worker | Ohio |
| 76 | Phyllis Kress | 15 | Daughter | New Worker | Ohio |
| 77 | Myrl Kress | 13 | Daughter | — | Ohio |
| 78 | Cloyd Kress | 11 | Son | — | Ohio |
| 79 | Neil Kress | 6 | Son | — | Ohio |
| 80 | Olis Kress | 4 | Daughter | — | Ohio |
Pedigree Summary
Ralph
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)