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John Reardon — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Essex, Massachusetts
Our Model Tree links this John Reardon across the 1930 and 1940 US Censuses in Essex, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 6-person household.
Age 7
b. ~1923
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, Massachusetts |
| Surname | Reardon |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | City Of Lawrence |
| Est. Birth Year | ~1923 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Joan Reardon | Daughter | — | 9 | ~1921 |
| Michael Reardon | Son | — | 11 | ~1919 |
| John Reardon | Son | — | 7 | ~1923 |
| Ellen Reardon | Head | — | 40 | ~1890 |
| Daniel Reardon | Son | — | 14 | ~1916 |
| Mary Reardon | Daughter | — | 13 | ~1917 |
Census Appearances
1930
Essex, Massachusetts
Son, age 7
Essex, Massachusetts · implied b. ~1923 — 6 household members
| Surname | Reardon |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Son, age 18
Essex-County, Massachusetts · implied b. ~1922 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Riordan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lawrence City |
| 1935 Residence (County) | Essex |
| Occupation | New Worker |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 · 1930 · age 7 · b. ~1923 · Massachusetts
★ You are viewing this record
Sibling
Michael Reardon
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Reardon
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joan Reardon
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Reardon
Sibling · 1930 · age 14
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
1930 US Federal Census — Essex, Massachusetts
Open full size
1930 US Federal Census — Essex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel897:0887)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Peter Mooney | 45 | Head | Printer | Northern Ireland |
| 52 | Bridget Mooney | 46 | Wife | — | Northern Ireland |
| 53 | Francis Mooney | 7 | Son | — | Massachusetts |
| 54 | Hannah Neely | 70 | Boarder | — | Northern Ireland |
| 55 | Alexander Miller | 46 | Head | Dye House | Northern Ireland |
| 56 | Katherine Miller | 40 | Wife | Stenographer | Irish Free State |
| 57 | James Stanion | 51 | Head | Left Family | Lithuania |
| 58 | Agnes Stanion | 48 | Wife | — | Lithuania |
| 59 | Mary Stanion | 26 | Daughter | — | Massachusetts |
| 60 | Wanda Stanion | 18 | Daughter | — | Massachusetts |
| 61 | Ellen Reardon | 40 | Head | — | Irish Free State |
| 62 | Daniel Reardon | 14 | Son | — | Massachusetts |
| 63 | Mary Reardon | 13 | Daughter | — | Massachusetts |
| 64 | Michael Reardon | 11 | Son | — | Massachusetts |
| 65 | Joan Reardon | 9 | Daughter | — | Massachusetts |
| 66 | John Reardon THIS PERSON | 7 | Son | — | Massachusetts |
| 67 | Chan Ark | 47 | Head | Cleaner & Laundry | California |
| 68 | Sue Si Chan Ark | 38 | Wife | — | China |
| 69 | Shin Sun Toy Chan Ark | 10 | Daughter | — | California |
| 70 | Bessie Chan Ark | 6 | Daughter | — | Massachusetts |
| 71 | Pauline Chan Ark | 5 | Daughter | — | Massachusetts |
| 72 | William Chan Ark | 4 | Son | — | Massachusetts |
| 73 | Rose Chan Ark | 3 | Daughter | — | Massachusetts |
| 74 | Lester Chan Ark | 2 | Son | — | Massachusetts |
| 75 | John Roach | 57 | Head | Operator | Massachusetts |
| 76 | Elizabeth Roach | 54 | Wife | Spinner | Massachusetts |
| 77 | Helen Roach | 28 | Daughter | Clerk | Massachusetts |
| 78 | John Roach | 26 | Son | Plumber'S Helper | Massachusetts |
| 79 | John Fleming | 75 | Head | Grocer | Irish Free State |
| 80 | Bridget Fleming | 72 | Wife | — | Irish Free State |
| 81 | Helen V. Fleming | 39 | Daughter | Clerk | Massachusetts |
| 82 | Margaret Gavin | 63 | Head | Servant | Massachusetts |
| 83 | Matthew Macdonald | 56 | Head | Police Officer | Massachusetts |
| 84 | Margaret Macdonald | 56 | Wife | — | Massachusetts |
| 85 | Margaret Macdonald | 26 | Daughter | Clerk | Massachusetts |
| 86 | Catherine E. Macdonald | 23 | Daughter | Teacher | Massachusetts |
| 87 | Joseph M. Macdonald | 21 | Son | — | Massachusetts |
| 88 | Walter Hall | 34 | Head | Battery Shop | England |
| 89 | Hilda F. Hall | 30 | Wife | — | England |
| 90 | Frank Turton | 41 | Head | Wool Sorter | England |
| 91 | Rose C. Turton | 37 | Wife | — | England |
| 92 | Walter S. Turton | 5 | Son | — | Massachusetts |
| 93 | Charles A. Callahan | 43 | Head | Foreman | Massachusetts |
| 94 | Mary V. Callahan | 43 | Wife | — | Irish Free State |
| 95 | Helen Callahan | 16 | Daughter | — | Massachusetts |
| 96 | Charles Callahan | 11 | Son | — | Massachusetts |
| 97 | Mary Alice Donahue | 24 | Head | Bookkeeper | Massachusetts |
| 98 | Katherine Meade | 47 | Mother | Cook | Massachusetts |
| 99 | John Lipay | 36 | Head | Janitor | Massachusetts |
| 100 | Helen Lipay | 28 | Wife | — | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)