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Thomas Leonard — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clinton-County, Iowa
Our Model Tree links this Thomas Leonard across the 1920, 1930 and 1940 US Censuses in Clinton-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1895), then head of a 9-person household.
Age 45
b. ~1895
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Clinton-County, Iowa |
| Surname | Leonard |
| Given Name | Thomas R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Clinton City |
| 1935 Residence (County) | Clinton |
| Additional Details | |
| Occupation | car department foreman |
| Industry | railroad shop |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 2200 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Car Department Foreman |
| Township / Ward | Clinton City |
| Est. Birth Year | ~1895 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Raymond Leonard | Son | — | 20 | ~1920 |
| Thomas Leonard | Head | — | 45 | ~1895 |
| Donald Leonard | Son | — | 15 | ~1925 |
| Angeline Leonard | Spouse | — | 41 | ~1899 |
| Kathleen Leonard | Daughter | — | 11 | ~1929 |
| Bernice Leonard | Daughter | — | 13 | ~1927 |
| John Leonard | Son | — | 17 | ~1923 |
| Delores Leonard | Daughter | — | 8 | ~1932 |
| Marian Leonard | Daughter | — | 5 | ~1935 |
Census Appearances
1920
Clinton, Iowa
Head, age 25
Clinton, Iowa · implied b. ~1895 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Thomas R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Supply Man |
| Industry | Steam Railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Clinton, Iowa
Head, age 35
Clinton, Iowa · implied b. ~1895 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leonard |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 29 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Shipping clerk |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 2000 |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Clinton-County, Iowa
Head, age 45
Clinton-County, Iowa · implied b. ~1895 — 9 household members
| Surname | Leonard |
| Given Name | Thomas R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Clinton City |
| 1935 Residence (County) | Clinton |
| Occupation | car department foreman |
| Industry | railroad shop |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 2200 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Leonard across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Thomas Leonard
Head · 1940 · age 45 · b. ~1895 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Clinton-County, Iowa
Open full size
1940 US Federal Census — Clinton-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01150-00254)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jessie M. Thomas | 62 | Head | — | Iowa |
| 42 | Jacob J. Heins | 66 | Head | Superintendent | Iowa |
| 43 | Mary C. Heins | 60 | Wife | — | Iowa |
| 44 | Alice M. Heins | 22 | Daughter | Cashier | Iowa |
| 45 | Thomas R. Leonard THIS PERSON | 45 | Head | Car Department Foreman | Iowa |
| 46 | Angeline T. Leonard | 41 | Wife | — | Iowa |
| 47 | Raymond R. Leonard | 20 | Son | Salesman | Iowa |
| 48 | John F. Leonard | 17 | Son | Newsboy | Iowa |
| 49 | Donald H. Leonard | 15 | Son | — | Iowa |
| 50 | Bernice E. Leonard | 13 | Daughter | — | Iowa |
| 51 | Kathleen M. Leonard | 11 | Daughter | — | Iowa |
| 52 | Delores A. Leonard | 8 | Daughter | — | Iowa |
| 53 | Marian R. Leonard | 5 | Daughter | — | Iowa |
| 54 | Ardis T. Farley | 44 | Head | Plumber | Iowa |
| 55 | Ethel S. Farley | 39 | Wife | — | Iowa |
| 56 | Lorene C. Hamm | 18 | Daughter | Telephone Operator | Iowa |
| 57 | Patricia A. Farley | 11 | Daughter | — | Iowa |
| 58 | Kathleen Farley | 9 | Daughter | — | Iowa |
| 59 | Reuben H. Beil | 54 | Head | Photographer | Iowa |
| 60 | Nancine Beil | 55 | Wife | — | Iowa |
| 61 | Richard M. Stewart | 61 | Head | — | Illinois |
| 62 | Marian F. Stewart | 57 | Wife | Maid | Iowa |
| 63 | Eva Tyler | 67 | Lodger | — | Iowa |
| 64 | Horace J. Thomas | 63 | Head | Salesman | Indiana |
| 65 | Jennie S. Thomas | 55 | Wife | — | Ohio |
| 66 | Max P. Fairchild | 80 | Brother-in-law | — | Ohio |
| 67 | Nora L. Fairchild | 79 | Mother-in-law | — | Ohio |
| 68 | Rodney B. Fitch | 38 | Head | Owner | Iowa |
| 69 | Ada S. Fitch | 37 | Wife | — | Minnesota |
| 70 | Jaclyn J. Fitch | 12 | Daughter | — | Iowa |
| 71 | Robert B. Fitch | 10 | Son | — | Iowa |
| 72 | Lester C. Larsen | 27 | Head | Truck Driver | Illinois |
| 73 | Gladys A. Larsen | 20 | Wife | — | Iowa |
| 74 | Douglas C. Larsen | 1 | Son | — | Iowa |
| 75 | William Everling | 74 | Head | Woodworker | Missouri |
| 76 | Emma Everling | 84 | Wife | — | Illinois |
| 77 | Louise C. Rowley | 62 | Servant | Servant | Missouri |
| 78 | Jacob C. Vogel | 40 | Head | Store Clerk | Illinois |
| 79 | Clara Vogel | 28 | Wife | Stitcher | Illinois |
| 80 | Arnold L. Vogel | 2 | Son | — | Iowa |
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)