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John Corcoran — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Corcoran across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 7-person household.
Age 11
b. ~1929
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Corcoran |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1929 |
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 |
|---|---|---|---|---|
| Patricia Corcoran | Daughter | — | 6 | ~1934 |
| John Corcoran | Son | — | 11 | ~1929 |
| Mary Corcoran | Spouse | — | 40 | ~1900 |
| Mary Corcoran | Daughter | — | 4 | ~1936 |
| Margaret Corcoran | Daughter | — | 2 | ~1938 |
| John Corcoran | Head | — | 43 | ~1897 |
| Robert Corcoran | Son | — | 10 | ~1930 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 1
Suffolk, Massachusetts · implied b. ~1929 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Corcoran |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Irish Free State |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 11
Suffolk-County, Massachusetts · implied b. ~1929 — 7 household members
| Surname | Corcoran |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Highest Grade | 7 |
| 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 Corcoran across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Corcoran
Son · 1940 · age 11 · b. ~1929 · Massachusetts
★ You are viewing this record
Sibling
Robert Corcoran
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Corcoran
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Corcoran
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Corcoran
Sibling · 1940 · age 4
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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01680-00804)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frederick Mckinnon | 48 | Head | Dentist | Massachusetts |
| 2 | Helen D Mckinnon | 46 | Wife | — | Massachusetts |
| 3 | Frederick Mckinnon | 20 | Son | — | Massachusetts |
| 4 | Arthur Mckinnon | 17 | Son | — | Massachusetts |
| 5 | Helen Mckinnon | 16 | Daughter | — | Massachusetts |
| 6 | Allan Mckinnon | 11 | Son | — | Massachusetts |
| 7 | Phillip Corbett | 51 | Head | Armorer | Massachusetts |
| 8 | Ann D Corbett | 53 | Wife | — | England |
| 9 | Walter Corbett | 23 | Son | — | Massachusetts |
| 10 | John P Sweeney | 38 | Head | Teacher | New Hampshire |
| 11 | Evangeline Sweeney | 31 | Wife | — | Massachusetts |
| 12 | John Jr. Sweeney | 4 | Son | — | Massachusetts |
| 13 | Elizabeth Sweeney | 2 | Daughter | — | Massachusetts |
| 14 | William Anderson | 54 | Head | State Examiner | England |
| 15 | Margaret F Anderson | 50 | Wife | — | Canada |
| 16 | Jane Nixon | 48 | Sister-in-law | Clerk | Massachusetts |
| 17 | Christopher Keeney | 72 | Head | — | Ireland |
| 18 | Mary Keeney | 68 | Wife | — | Ireland |
| 19 | Catherine Keeney | 38 | Daughter | Stenographer | Massachusetts |
| 20 | Louise Keeney | 37 | Daughter | Stenographer | Massachusetts |
| 21 | Winifred Keeney | 35 | Daughter | — | Massachusetts |
| 22 | Mary Keeney | 33 | Daughter | Stenographer | Massachusetts |
| 23 | John Keeney | 31 | Son | Gardener | Massachusetts |
| 24 | John Corcoran | 43 | Head | Teacher | Massachusetts |
| 25 | Mary Corcoran | 40 | Wife | — | Massachusetts |
| 26 | John Jr. Corcoran THIS PERSON | 11 | Son | — | Massachusetts |
| 27 | Robert Corcoran | 10 | Son | — | Massachusetts |
| 28 | Patricia A Corcoran | 6 | Daughter | — | Massachusetts |
| 29 | Mary Jane Corcoran | 4 | Daughter | — | Massachusetts |
| 30 | Margaret Corcoran | 2 | Daughter | — | Massachusetts |
| 31 | William Doherty | 43 | Head | Mechanical Engineer | Massachusetts |
| 32 | Margaret Doherty | 43 | Wife | — | Massachusetts |
| 33 | William J Doherty | 20 | Son | — | Massachusetts |
| 34 | Francis Doherty | 18 | Son | — | Massachusetts |
| 35 | Sally A Doherty | 11 | Daughter | — | Massachusetts |
| 36 | David G Doherty | 10 | Son | — | Massachusetts |
| 37 | Bernard Doherty | 5 | Son | — | Massachusetts |
| 38 | Joseph R Malone | 39 | Head | Teacher | Massachusetts |
| 39 | Mary M Malone | 37 | Wife | — | Massachusetts |
| 40 | Joseph R Malone | 8 | 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)