JL
John Leary — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Chester-County, Pennsylvania
Our Model Tree links this John Leary across the 1920, 1930 and 1940 US Censuses in Chester-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1886), then head of a 4-person household.
Age 54
b. ~1886
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Chester-County, Pennsylvania |
| Surname | Leary |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | West Caln Twp |
| 1935 Residence (County) | Chester |
| Additional Details | |
| Occupation | Farmer |
| Industry | Own farm |
| Class of Worker | OA |
| Hours Worked | 63 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Farmer |
| Township / Ward | West Caln Twp |
| 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 John | Age | Birth yr |
|---|---|---|---|---|
| Caroline Leary | Daughter | — | 24 | ~1916 |
| Harry Leary | Son | — | 30 | ~1910 |
| John Leary | Head | — | 54 | ~1886 |
| Adeline Leary | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Chester, Pennsylvania
Head, age 33
Chester, Pennsylvania · implied b. ~1887 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leary |
| Given Name | John M |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | Em |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Chester, Pennsylvania
Head, age 44
Chester, Pennsylvania · implied b. ~1886 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leary |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 20 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Chester-County, Pennsylvania
Head, age 54
Chester-County, Pennsylvania · implied b. ~1886 — 4 household members
| Surname | Leary |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | West Caln Twp |
| 1935 Residence (County) | Chester |
| Occupation | Farmer |
| Industry | Own farm |
| Class of Worker | OA |
| Hours Worked | 63 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Leary
Head · 1940 · age 54 · b. ~1886 · Pennsylvania
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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 — Chester-County, Pennsylvania
Open full size
1940 US Federal Census — Chester-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03467-00278)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Leary THIS PERSON | 54 | Head | Farmer | Pennsylvania |
| 2 | Adeline Leary | 54 | Wife | — | Pennsylvania |
| 3 | Harry Leary | 30 | Son | Farmer | Pennsylvania |
| 4 | Caroline Leary | 24 | Daughter | — | Pennsylvania |
| 5 | Parker Cairns | 53 | Head | Farmer | Pennsylvania |
| 6 | Annie Cairns | 48 | Wife | — | Pennsylvania |
| 7 | Clara Cairns | 36 | Daughter | — | Pennsylvania |
| 8 | James Cairns | 29 | Son | Farmer | Pennsylvania |
| 9 | Morris Cairns | 26 | Son | Farmer | Pennsylvania |
| 10 | Fred Schlining | 52 | Head | Machinist | Pennsylvania |
| 11 | Helen Schlining | 45 | Wife | — | Pennsylvania |
| 12 | Harry Schlining | 18 | Son | Machinist | Pennsylvania |
| 13 | Helen Schlining | 17 | Daughter | — | Pennsylvania |
| 14 | Edgar Schlining | 16 | Son | — | Pennsylvania |
| 15 | Goldie Steele | 49 | Head | Stewardess | Maryland |
| 16 | Harold Steele | 19 | Son | Caddy | Maryland |
| 17 | Norma Stork | 31 | Lodger | Waitress | Pennsylvania |
| 18 | Earl Loan | 47 | Head | Mechanic | Pennsylvania |
| 19 | Lillian Loan | 44 | Wife | — | Pennsylvania |
| 20 | Dorothy Loan | 14 | Daughter | — | Pennsylvania |
| 21 | Earl Loan | 11 | Son | — | Pennsylvania |
| 22 | William Loan | 8 | Son | — | Pennsylvania |
| 23 | Ray Loan | 4 | Son | — | Pennsylvania |
| 24 | Carl Dickinson | 21 | Son-in-law | Labor | Pennsylvania |
| 25 | Alice Dickinson | 16 | Daughter | — | Pennsylvania |
| 26 | Ralph Reynolds | 24 | Head | Farmer | Pennsylvania |
| 27 | Jean Reynolds | 18 | Wife | — | Pennsylvania |
| 28 | Mary Gregor | 64 | Head | Farmer | Hungary |
| 29 | Mary Gregor | 43 | Wife | — | Hungary |
| 30 | Helen Gregor | 16 | Daughter | — | Pennsylvania |
| 31 | Louis Gregor | 14 | Son | — | Pennsylvania |
| 32 | Katie Gregor | 12 | Daughter | — | Pennsylvania |
| 33 | Steven Gregor | 8 | Son | — | Pennsylvania |
| 34 | Eva Gregor | 6 | Daughter | — | Pennsylvania |
| 35 | Adam Gregor | 5 | Son | — | Pennsylvania |
| 36 | Lawrence Gregor | 1 | Son | — | Pennsylvania |
| 37 | John Gregor | 19 | Son | Labor | Pennsylvania |
| 38 | Edward Bilger | 52 | Head | Wood Cutter | Pennsylvania |
| 39 | Jennie Bilger | 61 | Wife | — | Austria |
| 40 | John Bilger | 25 | Son | Chipper | Pennsylvania |
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)