RT
Robert Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Robert Thomas across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents James & Martha — first a head (b.~1914), then head of a 4-person household.
Age 26
b. ~1914
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Thomas |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Helper Truck |
| Industry | Lumber Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 88 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Helper Truck |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1914 |
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 |
|---|---|---|---|---|
| Carolyn Thomas | Daughter | — | 6 | ~1934 |
| Judith Thomas | Daughter | — | 1 | ~1939 |
| Robert Thomas | Head | — | 26 | ~1914 |
| Frances Thomas | Spouse | — | 25 | ~1915 |
Census Appearances
1920
Marion, Indiana
Son, age 6
Marion, Indiana · implied b. ~1914 — 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 | 6 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 16
Marion, Indiana · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Head, age 26
Marion-County, Indiana · implied b. ~1914 — 4 household members
| Surname | Thomas |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Helper Truck |
| Industry | Lumber Co |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 88 |
| Highest Grade | H-3 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 2 locations, using XGBoost record linkage. Identified parents: father James Thomas (~0.92 confidence) and mother Martha Thomas (~0.92 confidence) and mother Martha Thomas (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Thomas
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Martha Thomas
b. ~1871
Source mother
● Household
· direct · ~0.92
Mother
Martha Thomas
b. ~1870
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Thomas
Head · 1940 · age 26 · b. ~1914 · Indiana
★ 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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01124-00219)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Anna Kinsey | 47 | Wife | — | Indiana |
| 2 | Robert Kinsey | 17 | Son | — | Indiana |
| 3 | Mary Jo Kinsey | 13 | Daughter | — | Indiana |
| 4 | Robert Thomas THIS PERSON | 26 | Head | Helper Truck | Indiana |
| 5 | Frances Thomas | 25 | Wife | — | Indiana |
| 6 | Carolyn Thomas | 6 | Daughter | — | Indiana |
| 7 | Judith L. Thomas | 1 | Daughter | — | Indiana |
| 8 | Lewis Leonard | 26 | Head | Salesman | Indiana |
| 9 | Pauline Leonard | 19 | Wife | — | Indiana |
| 10 | Patrice Leonard | 53 | Father | — | Kentucky |
| 11 | Glenn Mc Cory | 30 | Head | Tire Builder | Indiana |
| 12 | Eva Mc Cory | 28 | Wife | — | Kentucky |
| 13 | Glenn Jr. Mc Cory | 8 | Son | — | Indiana |
| 14 | Tracy Mc Cory | 2 | Son | — | Indiana |
| 15 | Murl Burris | 40 | Head | — | Indiana |
| 16 | William Burris | 18 | Son | — | Indiana |
| 17 | Pearl Heath | 47 | Head | — | Illinois |
| 18 | Howard J. Heath | 18 | Son | — | Indiana |
| 19 | Huldah Mulholland | 67 | Mother | — | Indiana |
| 20 | Frank Mulholland | 49 | Brother | Interior Decorating | Indiana |
| 21 | Howard Chapman | 54 | Head | — | Indiana |
| 22 | Grace Chapman | 51 | Wife | — | Indiana |
| 23 | Howard Chapman | 12 | Son | — | Indiana |
| 24 | Willis Chapman | 31 | Head | Laborer | Indiana |
| 25 | Josephine Chapman | 28 | Wife | — | Indiana |
| 26 | Jerry J. Chapman | 8 | Son | — | Indiana |
| 27 | Howard E. Chapman | 2 | Son | — | Indiana |
| 28 | Vera M. Chapman | 0 | Daughter | — | Indiana |
| 29 | Omer Hudson | 32 | Head | Bricklayer | Kentucky |
| 30 | Eleanor Hudson | 28 | Wife | — | Kentucky |
| 31 | Thomas Hudson | 25 | Head | Bottler | Kentucky |
| 32 | Dorothy Hudson | 23 | Wife | — | Indiana |
| 33 | Rose M. Hudson | 7 | Daughter | — | Indiana |
| 34 | Mary L. Hudson | 6 | Daughter | — | Indiana |
| 35 | Virginia Hudson | 4 | Daughter | — | Indiana |
| 36 | Claude P. Alexander | 49 | Head | — | Kentucky |
| 37 | Helen N. Alexander | 41 | Wife | — | Indiana |
| 38 | Robert E. Alexander | 11 | Son | — | Indiana |
| 39 | Donald C. Alexander | 12 | Son | — | Indiana |
| 40 | Murriell Brumfield | 24 | Head | Custodian | Ohio |
Related Census Records
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)