HT
Harold Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Calhoun-County, Michigan
Our Model Tree links this Harold Thomas across the 1920, 1930 and 1940 US Censuses in Calhoun-County, Michigan (XGBoost, ~Confirmed), with identified parents Theodore & Bessie — first a head (b.~1916), then head of a 3-person household.
Age 24
b. ~1916
Male
Head
Born: Michigan
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Calhoun-County, Michigan |
| Surname | Thomas |
| Given Name | Harold S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Jackson |
| 1935 Residence (County) | Jackson |
| Additional Details | |
| Occupation | Grocer Clerk |
| Industry | Kroger Co. |
| Class of Worker | PW |
| Hours Worked | 55 |
| Income (1939) | 298 |
| Highest Grade | Hs 3 |
| 1935 Residence | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | Grocer Clerk |
| Township / Ward | Marshall |
| Est. Birth Year | ~1916 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| Neil Thomas | Son | — | ~1940 | |
| Evelyn Thomas | Spouse | — | 23 | ~1917 |
| Harold Thomas | Head | — | 24 | ~1916 |
Census Appearances
1920
Calhoun, Michigan
Son, age 4
Calhoun, Michigan · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Harold |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Calhoun, Michigan
Son, age 14
Calhoun, Michigan · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Harold L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Calhoun-County, Michigan
Head, age 24
Calhoun-County, Michigan · implied b. ~1916 — 3 household members
| Surname | Thomas |
| Given Name | Harold S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Jackson |
| 1935 Residence (County) | Jackson |
| Occupation | Grocer Clerk |
| Industry | Kroger Co. |
| Class of Worker | PW |
| Hours Worked | 55 |
| Income (1939) | 298 |
| Highest Grade | Hs 3 |
| 1935 Residence | Michigan |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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: father Theodore Thomas (~0.92 confidence) and mother Bessie Thomas (~0.92 confidence) and mother Helen Thomas (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Theodore Thomas
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Bessie Thomas
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Helen Thomas
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Thomas
Head · 1940 · age 24 · b. ~1916 · Michigan
★ 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 — Calhoun-County, Michigan
Open full size
1940 US Federal Census — Calhoun-County, Michigan
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01737-00495)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jules A. Kessel | 36 | Head | Salesman | Illinois |
| 2 | Vivian R. Kessel | 37 | Wife | Salesman | Illinois |
| 3 | Robert I. Kessel | 8 | Son | — | Illinois |
| 4 | Irwin J. Kessel | 7 | Son | — | Illinois |
| 5 | Delores T. Kessel | 5 | Daughter | — | Illinois |
| 6 | L. W. Shaffer | 32 | Head | Owner & Mgr. | Indiana |
| 7 | Vera Shaffer | 32 | Wife | — | Indiana |
| 8 | Harold S. Thomas THIS PERSON | 24 | Head | Grocer Clerk | Michigan |
| 9 | Evelyn A. Thomas | 23 | Wife | — | Ohio |
| 10 | Neil S. Thomas | 0 | Son | — | Michigan |
| 11 | James H. Curtis | 40 | Head | History Expert | Michigan |
| 12 | Bernadine Curtis | 38 | Wife | Bookkeeper | Michigan |
| 13 | Mary Jane Dolph | 19 | Lodger | — | Michigan |
| 14 | Samuel Lwaitort | 67 | Head | Owner & Manager | Michigan |
| 15 | Minnie Lwaitort | 58 | Wife | — | Michigan |
| 16 | Evelyn Benson | 27 | Step Daughter | Owner & Manager | Michigan |
| 17 | Findis S. Dent | 62 | Head | Owner & Manager | Michigan |
| 18 | Ada B. Dent | 62 | Wife | — | Michigan |
| 19 | Rose Button | 55 | Sister-in-law | Bookkeeper | Michigan |
| 20 | Duall Struble | 28 | Head | Meat Cutter | Michigan |
| 21 | Eylene Struble | 28 | Wife | — | Michigan |
| 22 | Sharon Struble | 0 | Daughter | — | Michigan |
| 23 | Barney A. Bliss | 76 | Head | Unable To Work | Michigan |
| 24 | Etta S. Bliss | 74 | Wife | — | New York |
| 25 | Rhea Bliss | 32 | Daughter | Housekeeper | Michigan |
| 26 | Lillian Culver | 50 | Lodger | Housekeeper | Michigan |
| 27 | Royal Grant | 61 | Head | Treasurer | Michigan |
| 28 | Hazel Grant | 51 | Wife | — | Michigan |
| 29 | George Exner | 76 | Father-in-law | — | Michigan |
| 30 | Myron Grant | 34 | Son | Bookkeeper | Michigan |
| 31 | Vesta Grant | 35 | Daughter-in-law | Saleslady | Michigan |
| 32 | Thomas J. Swartout | 67 | Head | Owner & Manager | Michigan |
| 33 | Anna M. Swartout | 65 | Wife | — | Michigan |
| 34 | Gail Delanois | 27 | Daughter | Filing Clerk | Michigan |
| 35 | Philip R. Delanois | 5 | Grandson | — | Illinois |
| 36 | Peter Swartout | 35 | Son | Traveling Salesman | Michigan |
| 37 | George C. Ruddock | 46 | Head | Purchasing Agent | Michigan |
| 38 | Gladys Ruddock | 48 | Wife | — | Michigan |
| 39 | Mrs. Morten Lewis | 70 | Mother | — | Michigan |
Pedigree Summary
Harold
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)