HT
Harold Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Perry-County, Ohio
Our Model Tree links this Harold Thomas across the 1920, 1930 and 1940 US Censuses in Perry-County, Ohio (XGBoost, ~Confirmed), with identified parents Ollie & David — first a son (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Perry-County, Ohio |
| Surname | Thomas |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Bearfield - sup mines |
| 1935 Residence (County) | Perry |
| Additional Details | |
| Occupation | Coal miner |
| Industry | Coal |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Coal Miner |
| Township / Ward | Bearfield Sup Mines |
| Est. Birth Year | ~1918 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| Ollie Thomas | Spouse | — | 53 | ~1887 |
| Helen Thomas | Daughter | — | 16 | ~1924 |
| David Thomas | Head | — | 54 | ~1886 |
| Harold Thomas | Son | — | 22 | ~1918 |
Census Appearances
1920
Perry, Ohio
Son, age 2
Perry, Ohio · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Harold V. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Perry, Ohio
Son, age 12
Perry, Ohio · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Harold V |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Kentucky |
| Mother's Birthplace | Kentucky |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Perry-County, Ohio
Son, age 22
Perry-County, Ohio · implied b. ~1918 — 4 household members
| Surname | Thomas |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Bearfield - sup mines |
| 1935 Residence (County) | Perry |
| Occupation | Coal miner |
| Industry | Coal |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 400 |
| 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 Harold Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Ollie Thomas (~0.92 confidence) and father David Thomas (~0.92 confidence) and mother Ollie Thomas (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Ollie Thomas
b. ~1885
Source mother
● Household
· direct · ~0.92
Father
David Thomas
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Ollie Thomas
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Thomas
Son · 1940 · age 22 · b. ~1918 · Ohio
★ You are viewing this record
Sibling
Helen Thomas
Sibling · 1940 · age 16
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 — Perry-County, Ohio
Open full size
1940 US Federal Census — Perry-County, Ohio
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-03127-00025)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Wolfe | 31 | Head | Coal Miner | Kentucky |
| 42 | Goldie Wolfe | 29 | Wife | Housewife | Ohio |
| 43 | Rosella Wolfe | 10 | Daughter | — | Ohio |
| 44 | Melvin Wolfe | 8 | Son | — | Ohio |
| 45 | Sarah Lanning | 45 | Head | House Work | Ohio |
| 46 | James Lanning | 9 | Daughter | — | Ohio |
| 47 | James E Barber | 72 | Head | Farmer | North Carolina |
| 48 | Melda Barber | 68 | Wife | Housewife | North Carolina |
| 49 | Chester Barber | 32 | Son | Lumber Cutter | North Carolina |
| 50 | Mark Aldredge | 40 | Head | Coal Miner | Ohio |
| 51 | Ruby M Aldredge | 37 | Wife | Housewife | Kentucky |
| 52 | Margerie Aldredge | 10 | Daughter | — | Ohio |
| 53 | Edgar Lee Aldredge | 6 | Son | — | Ohio |
| 54 | Maggie Thomas | 72 | Mother-in-law | — | Ohio |
| 55 | David Thomas | 54 | Head | Coal Miner | Kentucky |
| 56 | Ollie Thomas | 53 | Wife | Housewife | Kentucky |
| 57 | Harold Thomas THIS PERSON | 22 | Son | Coal Miner | Ohio |
| 58 | Helen Thomas | 16 | Daughter | House Work | Ohio |
| 59 | Elmer Wolfe | 25 | Head | Clerk | Ohio |
| 60 | Kathryn Wolfe | 24 | Wife | Housewife | Ohio |
| 61 | Gail Wolfe | 5 | Son | — | Ohio |
| 62 | George Williams | 33 | Head | Coal Miner | Kentucky |
| 63 | Alma Williams | 21 | Wife | Housewife | Ohio |
| 64 | Carol Ann Williams | 4 | Daughter | — | Ohio |
| 65 | George Burton Williams | 2 | Son | — | Ohio |
| 66 | Terry Blane Williams | 0 | Son | — | Ohio |
| 67 | Laura Ladra | 53 | Mother | House Work | Kentucky |
| 68 | Alvah Boen | 30 | Head | Coal Miner | Ohio |
| 69 | Pauline Boen | 21 | Wife | Housewife | Ohio |
| 70 | Peggy June Boen | 2 | Daughter | — | Ohio |
| 71 | John Vandegriff | 74 | Head | Farmer | Penn. |
| 72 | Philip Mcelfresh | 33 | Head | Coal Miner | Ohio |
| 73 | Blanche Mcelfresh | 33 | Wife | Housewife | Ohio |
| 74 | Jack Mcelfresh | 14 | Son | New Worker | Ohio |
| 75 | Margaret Mcelfresh | 12 | Daughter | — | Ohio |
| 76 | Norma Mcelfresh | 8 | Daughter | — | Ohio |
| 77 | William J Smith | 55 | Head | Coal Miner | Ohio |
| 78 | Mayre Smith | 49 | Wife | Housewife | Ohio |
Pedigree Summary
Harold + 1 sibling
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)