JR
John Reardon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Indiana
Our Model Tree links this John Reardon across the 1930 and 1940 US Censuses in Lake-County, Indiana (XGBoost, ~Confirmed) — first a son (b.~1921), then head of a 9-person household.
Age 19
b. ~1921
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Indiana |
| Surname | Reardon |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | East Chicago |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | East Chicago |
| Est. Birth Year | ~1921 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Jane Reardon | Daughter | — | 17 | ~1923 |
| Daniel Reardon | Son | — | 8 | ~1932 |
| Mildred Reardon | Daughter | — | 21 | ~1919 |
| John Reardon | Son | — | 19 | ~1921 |
| James Reardon | Son | — | 15 | ~1925 |
| John Reardon | Head | — | 53 | ~1887 |
| Mary Reardon | Spouse | — | 51 | ~1889 |
| Norene Reardon | Daughter | — | 23 | ~1917 |
| Vergene Reardon | Daughter | — | 13 | ~1927 |
Census Appearances
1930
Lake, Indiana
Son, age 9
Lake, Indiana · implied b. ~1921 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Reardon |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Lake-County, Indiana
Son, age 19
Lake-County, Indiana · implied b. ~1921 — 9 household members
| Surname | Reardon |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | East Chicago |
| 1935 Residence (County) | Lake |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Reardon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Reardon
Son · 1940 · age 19 · b. ~1921 · Indiana
★ You are viewing this record
Sibling
James Reardon
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vergene Reardon
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Reardon
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Norene Reardon
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Reardon
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Reardon
Sibling · 1940 · age 17
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 — Lake-County, Indiana
Open full size
1940 US Federal Census — Lake-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01065-00779)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Orin Crea | 49 | Head | Electric Foreman | Indiana |
| 2 | Gracia D Crea | 50 | Wife | — | Indiana |
| 3 | Ray Leigh | 22 | Son-in-law | Laborer | Illinois |
| 4 | Louise Leigh | 20 | Daughter | Stenographer | Indiana |
| 5 | Georgia Leigh | 16 | Daughter | — | Indiana |
| 6 | Joseph Adley | 56 | Head | Salesman | Pennsylvania |
| 7 | Pearl D Adley | 60 | Wife | — | Colorado |
| 8 | Blake Mcquilkin | 25 | Son-in-law | Electrician | Indiana |
| 9 | Bernice Mcquilkin | 24 | Daughter | — | Colorado |
| 10 | Deane Mcquilkin | 4 | Granddaughter | — | Indiana |
| 11 | Bonnie Mcquilkin | 3 | Granddaughter | — | Indiana |
| 12 | Charles William Strom | 55 | Head | Maintenance Engineer | Illinois |
| 13 | Esther B. O. Strom | 53 | Wife | — | Illinois |
| 14 | Charles Frederick Strom | 27 | Son | Assistant Chief Chemist | Illinois |
| 15 | Robert William Strom | 20 | Son | New Worker | Illinois |
| 16 | William T Podge | 38 | Lodger | Art Instructor | Iowa |
| 17 | John C Baker | 39 | Head | Superintendent | Pennsylvania |
| 18 | Alva S Baker | 35 | Wife | — | Pennsylvania |
| 19 | Jack Baker | 6 | Son | — | Indiana |
| 20 | Bruce Baker | 1 | Son | — | Indiana |
| 21 | John Reardon | 53 | Head | Janitor-Purging Water Department | Pennsylvania |
| 22 | Mary Elizabeth Reardon | 51 | Wife | — | Illinois |
| 23 | Norene Reardon | 23 | Daughter | Comptometer Operator | Indiana |
| 24 | Mildred Reardon | 21 | Daughter | Stenographer | Indiana |
| 25 | John Reardon THIS PERSON | 19 | Son | — | Indiana |
| 26 | Jane Reardon | 17 | Daughter | — | Indiana |
| 27 | James Reardon | 15 | Son | — | Indiana |
| 28 | Vergene Reardon | 13 | Daughter | — | Indiana |
| 29 | Daniel Reardon | 8 | Son | — | Indiana |
| 30 | Martin S Liehr | 22 | Head | Salesman | Indiana |
| 31 | Raymond Liehr | 39 | Head | Physician | Indiana |
| 32 | George T. Baker | 38 | Head | Tank Repairman | Kentucky |
| 33 | Dorothy D Baker | 34 | Wife | — | Pennsylvania |
| 34 | Marjorie Baker | 12 | Daughter | — | Indiana |
| 35 | Hans Savage | 50 | Head | Janitor | Lithuania |
| 36 | Esther D Savage | 48 | Wife | — | Lithuania |
| 37 | Helen Savage | 24 | Daughter | — | Illinois |
| 38 | Edward Savage | 20 | Son | — | Indiana |
| 39 | Joe Marmo | 28 | Nephew | Laborer | Indiana |
| 40 | Winifred Marma | 31 | Niece | Stenographer | Indiana |
Related Census Records
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)