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John Reardon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this John Reardon across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1908), then head of a 10-person household.
Age 32
b. ~1908
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Reardon |
| Given Name | John J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Highest Grade | No 2 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Newburyport |
| Est. Birth Year | ~1908 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Reardon | Son | — | 32 | ~1908 |
| Gerald Reardon | Son | — | 19 | ~1921 |
| Hanna Reardon | Spouse | — | 57 | ~1883 |
| Edward Reardon | Son | — | 26 | ~1914 |
| James Reardon | Son | — | 22 | ~1918 |
| Mary Reardon | Daughter | — | 23 | ~1917 |
| Daniel Reardon | Son | — | 28 | ~1912 |
| Michael Reardon | Son | — | 31 | ~1909 |
| Margaret Reardon | Daughter | — | 17 | ~1923 |
| Patrick Reardon | Head | — | 58 | ~1882 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 21
Middlesex, Massachusetts · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Reardon |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Chauffeur |
| Industry | Private Family |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Son, age 32
Essex-County, Massachusetts · implied b. ~1908 — 10 household members
| Surname | Reardon |
| Given Name | John J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (County) | Essex |
| Highest Grade | No 2 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 32 · b. ~1908 · Massachusetts
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Sibling
James Reardon
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Reardon
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Reardon
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Reardon
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Reardon
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Reardon
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Reardon
Sibling · 1940 · age 28
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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01587-00398)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jeremiah Quill | 34 | Head | Laborer | Free State |
| 42 | Julia Quill | 37 | Wife | — | Free State |
| 43 | Mary Quill | 2 | Daughter | — | Massachusetts |
| 44 | Henry B Quill | 0 | Son | — | Massachusetts |
| 45 | Donald Currier | 34 | Head | 30 | Massachusetts |
| 46 | Beatrice Currier | 29 | Wife | — | Massachusetts |
| 47 | Carlene Currier | 8 | Daughter | — | Massachusetts |
| 48 | Wilma Currier | 6 | Daughter | — | Massachusetts |
| 49 | Beryl Currier | 2 | Daughter | — | Massachusetts |
| 50 | Mary A Cronin | 47 | Head | — | Massachusetts |
| 51 | William P Cronin | 67 | Husband | 42 | Massachusetts |
| 52 | Catherine Cronin | 25 | Daughter | 40 | Massachusetts |
| 53 | William P Cronin | 24 | Son | 42 | Massachusetts |
| 54 | Andrew P Cronin | 23 | Son | 60 | Massachusetts |
| 55 | Frederick A Cronin | 21 | Son | 60 | Massachusetts |
| 56 | Clare M Cronin | 15 | Daughter | — | Massachusetts |
| 57 | Phillip A Cronin | 13 | Son | — | Massachusetts |
| 58 | Francis M Cronin | 11 | Daughter | — | Massachusetts |
| 59 | Catharinew Haley | 46 | Head | 40 | Massachusetts |
| 60 | Dennis E Donahue | 44 | Brother | 40 | Massachusetts |
| 61 | Patrick Reardon | 58 | Head | Engineer | Free State |
| 62 | Hanna Reardon | 57 | Wife | — | Free State |
| 63 | John J Reardon THIS PERSON | 32 | Son | — | Massachusetts |
| 64 | Michael R Reardon | 31 | Son | 40 | Massachusetts |
| 65 | Daniel F Reardon | 28 | Son | 40 | Massachusetts |
| 66 | Edward J Reardon | 26 | Son | 54 | Massachusetts |
| 67 | Mary E Reardon | 23 | Daughter | 40 | Massachusetts |
| 68 | James P Reardon | 22 | Son | — | Massachusetts |
| 69 | Gerald V Reardon | 19 | Son | — | Massachusetts |
| 70 | Margaret V Reardon | 17 | Daughter | — | Massachusetts |
| 71 | Herbert F Frost | 75 | Head | 40 | New Jersey |
| 72 | Lena B Frost | 71 | Wife | — | Massachusetts |
| 73 | Charles L Becker | 52 | Head | 40 | Ohio |
| 74 | Georgie Becker | 52 | Wife | — | Massachusetts |
| 76 | Agnes A Roaf | 72 | Mother | Nurse | Canada English |
| 77 | Edwin Langdon | 57 | Head | 42 | Massachusetts |
| 78 | Elizabeth Langdon | 57 | Wife | — | Massachusetts |
| 79 | Henry R Langdon | 22 | Son | — | Massachusetts |
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)