JL
John Leary — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clark-County, Ohio
Our Model Tree links this John Leary across the 1930 and 1940 US Censuses in Clark-County, Ohio (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 7-person household.
Age 13
b. ~1927
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Clark-County, Ohio |
| Surname | Leary |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Clark |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Springfield |
| Est. Birth Year | ~1927 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Leary | Head | — | 46 | ~1894 |
| Anne Leary | Daughter | — | 23 | ~1917 |
| John Leary | Son | — | 13 | ~1927 |
| Louise Leary | Daughter | — | 25 | ~1915 |
| Jeanne Leary | Daughter | — | 9 | ~1931 |
| Joann Leary | Daughter | — | 11 | ~1929 |
| Rosetta Leary | Spouse | — | 44 | ~1896 |
Census Appearances
1930
Clark, Ohio
Son, age 3
Clark, Ohio · implied b. ~1927 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leary |
| Given Name | John F. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Clark-County, Ohio
Son, age 13
Clark-County, Ohio · implied b. ~1927 — 7 household members
| Surname | Leary |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Clark |
| Highest Grade | 8 |
| 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 John Leary across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Leary
Son · 1940 · age 13 · b. ~1927 · Ohio
★ You are viewing this record
Sibling
Jeanne Leary
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joann Leary
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louise Leary
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Leary
Sibling · 1940 · age 23
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 — Clark-County, Ohio
Open full size
1940 US Federal Census — Clark-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03039-00341)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John H Leary | 46 | Head | Clerk | Massachusetts |
| 2 | Rosetta A Leary | 44 | Wife | — | Ohio |
| 3 | Louise Leary | 25 | Daughter | Clerk | Ohio |
| 4 | Anne Marie Leary | 23 | Daughter | Stenographer | Ohio |
| 5 | John Jr Leary THIS PERSON | 13 | Son | — | Ohio |
| 6 | Joann Leary | 11 | Daughter | — | Ohio |
| 7 | Jeanne Leary | 9 | Daughter | — | Ohio |
| 8 | Thomas B Mahon | 48 | Head | Pressman | Illinois |
| 9 | Mae Mahon | 54 | Wife | — | Tennessee |
| 10 | William Mahon | 16 | Son | — | Ohio |
| 11 | Gordon Hutrick | 24 | Nephew | Maintenance Man | Tennessee |
| 12 | Mary H Walsh | 70 | Head | — | Ohio |
| 13 | Daniel B Walsh | 70 | Husband | Proprietor | Ohio |
| 14 | Derrell Steffer | 32 | Head | Accountant | Ohio |
| 15 | Lucia P Steffer | 32 | Wife | — | Ohio |
| 16 | David Steffer | 3 | Son | — | Ohio |
| 17 | Edward Herman | 41 | Head | Manager | Ohio |
| 18 | Emma Herman | 40 | Wife | — | Kentucky |
| 19 | Edward Jr Herman | 13 | Son | — | Ohio |
| 20 | Robert Herman | 8 | Son | — | Ohio |
| 21 | Donald Herman | 7 | Son | — | Ohio |
| 22 | Vitalous Lee | 48 | Head | Department Manager | Pennsylvania |
| 23 | Elsie Lee | 47 | Wife | Apprentice Demonstrator | Ohio |
| 24 | Elsa Lee | 13 | Daughter | — | Ohio |
| 25 | Edgar Hanford | 51 | Head | Reporter | New Jersey |
| 26 | Frances Hanford | 42 | Wife | — | Ohio |
| 27 | Edgar L Hanford | 14 | Son | — | Ohio |
| 28 | Stanley H Lawwill | 49 | Head | Proprietor | Ohio |
| 29 | Zana R Lawwill | 45 | Wife | Office Work | Ohio |
| 30 | Frank Otstot | 47 | Head | Superintendent | Ohio |
| 31 | Garret Otstot | 28 | Son | — | Ohio |
| 32 | Kenneth Otstot | 19 | Son | Truck Driver | Ohio |
| 33 | Paul B Dailey | 38 | Head | Traffic Manager | Ohio |
| 34 | Mildred A Dailey | 38 | Wife | Operator And Proprietor | Ohio |
| 35 | Jonas F Thomas | 35 | Head | Broker | Ohio |
| 36 | Vivian Thomas | 28 | Wife | — | Indiana |
| 37 | Bruce Thomas | 7 | Son | — | Ohio |
| 38 | Steven Thomas | 4 | Son | — | Ohio |
| 39 | Ruth Lightle | 19 | Companion | — | Ohio |
| 40 | Russell Ullery | 41 | Head | Assistant Vice President | 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)