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Thomas Duffy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clark-County, Ohio
Our Model Tree links this Thomas Duffy across the 1910, 1920, 1930 and 1940 US Censuses in Clark-County, Ohio (XGBoost, ~Confirmed) — first a head (b.~1886), then head of a 4-person household.
Age 54
b. ~1886
Male
Head
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Clark-County, Ohio |
| Surname | Duffy |
| Given Name | Thomas A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Clark |
| Additional Details | |
| Occupation | Machine Hand |
| Industry | Auto Truck Works |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | 3 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Machine Hand |
| Township / Ward | Springfield |
| Est. Birth Year | ~1886 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Thomas Duffy | Head | — | 54 | ~1886 |
| John Duffy | Son | — | 18 | ~1922 |
| Reuna Duffy | Spouse | — | 49 | ~1891 |
| James Duffy | Son | — | 7 | ~1933 |
Census Appearances
1910
Clark, Ohio
Head, age 24
Clark, Ohio · implied b. ~1886 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Ohio |
| Years Married | 0 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Machine hand |
| Industry | Factory |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1920
Licking, Ohio
Head, age 33
Licking, Ohio · implied b. ~1887 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Thomas A |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Ohio |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | farmer |
| Industry | agriculture |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Clark, Ohio
Head, age 44
Clark, Ohio · implied b. ~1886 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Thomas A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Ohio |
| Age at First Marriage | 23 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Machinist |
| Industry | Body Works |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 4500 |
| Radio Set | R |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Clark-County, Ohio
Head, age 54
Clark-County, Ohio · implied b. ~1886 — 4 household members
| Surname | Duffy |
| Given Name | Thomas A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Clark |
| Occupation | Machine Hand |
| Industry | Auto Truck Works |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | 3 |
| 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 Thomas Duffy across 4 US Census years (1910, 1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
Thomas Duffy
Head · 1940 · age 54 · b. ~1886 · 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 — Clark-County, Ohio
Open full size
1940 US Federal Census — Clark-County, Ohio
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03038-00711)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sylvia J. Cook | 2 | Daughter | — | Ohio |
| 2 | Larry B. Cook | 0 | Son | — | Ohio |
| 3 | Leon H. Oates | 41 | Head | Metal Grinder | Ohio |
| 4 | Ruth P. Oates | 42 | Wife | — | Ohio |
| 5 | Richard N. Oates | 9 | Son | — | Ohio |
| 6 | Mary S. Oates | 71 | Mother | — | Ohio |
| 7 | Patrick Cunningham | 62 | Head | Foreman | Ohio |
| 8 | Elizabeth C. Cunningham | 59 | Wife | — | Ohio |
| 9 | Thomas A. Duffy THIS PERSON | 54 | Head | Machine Hand | Ohio |
| 10 | Reuna F. Duffy | 49 | Wife | — | Ohio |
| 11 | John E. Duffy | 18 | Son | New Worker | Ohio |
| 12 | James R. Duffy | 7 | Son | — | Ohio |
| 13 | Owen M. Oates | 49 | Head | Retail Groc. | Ohio |
| 14 | Rena Oates | 47 | Wife | — | Ohio |
| 15 | Harry L. Oates | 19 | Son | Stenographer | Ohio |
| 16 | Victor E. Hicks | 29 | Head | Asst. Treasurer | Ohio |
| 17 | Pauline M. Hicks | 29 | Wife | — | Ohio |
| 18 | Richard R. Hicks | 2 | Son | — | Ohio |
| 19 | John E. Allaway | 22 | Brother-in-law | — | Ohio |
| 20 | John O. Smith | 70 | Head | — | Ohio |
| 21 | Carrie E. Smith | 65 | Wife | — | Ohio |
| 22 | Marjorie Smith | 36 | Daughter | Teacher | Ohio |
| 23 | David P. Driscoll | 58 | Head | — | Ohio |
| 24 | Mary V. Driscoll | 64 | Wife | — | Ohio |
| 25 | Harold F. Ballroom | 34 | Head | Salesman | Ohio |
| 26 | Frances R. Ballroom | 34 | Wife | Sales Lady | Ohio |
| 27 | Robert G. Ballroom | 15 | Son | — | Ohio |
| 28 | Taylor L. Woodhouse | 25 | Head | Carpenter | Ohio |
| 29 | Ruby E. Woodhouse | 24 | Wife | — | Penn. |
| 30 | Le Roy A. Woodhouse | 2 | Son | — | Ohio |
| 31 | Stanley L. Woodhouse | 0 | Son | — | Ohio |
| 32 | Lucy F. Mccready | 21 | Sister-in-law | Carpenter | Ohio |
| 33 | Orille E. Kerswell | 41 | Head | Tool Maker | Ohio |
| 34 | Minnie B. Kerswell | 40 | Wife | — | Ohio |
| 35 | Richard D. Snelling | 26 | Head | Traveling | Ohio |
| 36 | Pauline M. Snelling | 25 | Wife | — | Ohio |
| 37 | Maria E. Snelling | 3 | Daughter | — | Ohio |
| 38 | Adela M. Snelling | 2 | Daughter | — | Ohio |
| 39 | Richard D. Jr. Snelling | 0 | Son | — | Ohio |
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)