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John Leary — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Pennsylvania
Our Model Tree links this John Leary across the 1930 and 1940 US Censuses in Montgomery-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1916), then head of a 7-person household.
Age 24
b. ~1916
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Pennsylvania |
| Surname | Leary |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Abington Twp |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Painter |
| Industry | Building Construction |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Painter |
| Township / Ward | Abington Twp |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Henry Leary | Son | — | 17 | ~1923 |
| John Leary | Head | — | 45 | ~1895 |
| Daniel Leary | Son | — | 22 | ~1918 |
| John Leary | Son | — | 24 | ~1916 |
| Anna Leary | Spouse | — | 49 | ~1891 |
| Joseph Leary | Son | — | 26 | ~1914 |
| Anna Leary | Daughter | — | 21 | ~1919 |
Census Appearances
1930
Delaware, Pennsylvania
Son, age 13
Delaware, Pennsylvania · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leary |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Montgomery-County, Pennsylvania
Son, age 24
Montgomery-County, Pennsylvania · implied b. ~1916 — 7 household members
| Surname | Leary |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Abington Twp |
| 1935 Residence (County) | Montgomery |
| Occupation | Painter |
| Industry | Building Construction |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | Hs 3 |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Leary
Son · 1940 · age 24 · b. ~1916 · Pennsylvania
★ You are viewing this record
Sibling
Henry Leary
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Leary
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Leary
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Leary
Sibling · 1940 · age 26
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 — Montgomery-County, Pennsylvania
Open full size
1940 US Federal Census — Montgomery-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03576-00536)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Kelly | 40 | Head | Painter | Northern Ireland |
| 2 | Martha Kelly | 41 | Wife | — | Northern Ireland |
| 3 | Margaret Kelly | 15 | Daughter | — | Pennsylvania |
| 4 | Martha Kelly | 14 | Daughter | — | Pennsylvania |
| 5 | Dorothy Kelly | 12 | Daughter | — | Pennsylvania |
| 6 | Ernestine Kelly | 10 | Daughter | — | Pennsylvania |
| 7 | Caroline Klockner | 64 | Head | — | Pennsylvania |
| 8 | William Sharkey | 15 | Boarder | — | Pennsylvania |
| 9 | Frederick Syrick | 11 | Boarder | — | Pennsylvania |
| 10 | John Sharkey | 10 | Boarder | — | Pennsylvania |
| 11 | Joseph O'Brien | 30 | Head | Machinist | Pennsylvania |
| 12 | Constance O'Brien | 28 | Wife | — | Pennsylvania |
| 13 | Florence Saessig | 42 | Head | — | Pennsylvania |
| 14 | Thelma Saessig | 17 | Daughter | — | Pennsylvania |
| 15 | Gladys Surick | 16 | Boarder | — | Pennsylvania |
| 16 | Anna Surick | 13 | Boarder | — | Pennsylvania |
| 17 | Helen Curtis | 15 | Boarder | — | Pennsylvania |
| 18 | George Castor | 81 | Head | — | Pennsylvania |
| 19 | Solus Ruzicka | 52 | Head | Florist | Austria |
| 20 | Hermina Ruzicka | 44 | Wife | — | Austria |
| 21 | Louis Ruzicka | 19 | Son | New Worker | Pennsylvania |
| 22 | Irene Ruzicka | 17 | Daughter | — | Pennsylvania |
| 23 | Joseph Behan | 38 | Head | Electrician | Pennsylvania |
| 24 | Nellie Behan | 36 | Wife | — | Pennsylvania |
| 25 | Joseph Behan | 13 | Son | — | Pennsylvania |
| 26 | John Behan | 11 | Son | — | Pennsylvania |
| 27 | Marie Striml | 60 | Head | — | Austria |
| 28 | William Striml | 26 | Son | — | Pennsylvania |
| 29 | John Striml | 24 | Son | — | Pennsylvania |
| 30 | Anna Striml | 24 | Daughter | — | Pennsylvania |
| 31 | John Leary | 45 | Head | Painter | Eire |
| 32 | Anna Leary | 49 | Wife | — | Pennsylvania |
| 33 | Joseph Leary | 26 | Son | — | Pennsylvania |
| 34 | John Leary THIS PERSON | 24 | Son | Painter | Pennsylvania |
| 35 | Daniel Leary | 22 | Son | Painter | Pennsylvania |
| 36 | Anna Leary | 21 | Daughter | Maid | Pennsylvania |
| 37 | Henry Leary | 17 | Son | New Worker | Pennsylvania |
| 38 | John Mcneil | 44 | Head | Foreman | Pennsylvania |
| 39 | Katherine Mcneil | 41 | Wife | — | Pennsylvania |
| 40 | Mary Mcneil | 19 | Daughter | Stenographer | 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)