JC
John Carney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Carney across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 8-person household.
Age 25
b. ~1915
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Carney |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston |
| Est. Birth Year | ~1915 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Carney | Spouse | — | 54 | ~1886 |
| Warren Carney | Son | — | 15 | ~1925 |
| Richard Carney | Son | — | 18 | ~1922 |
| Paul Carney | Son | — | 21 | ~1919 |
| Helen Carney | Daughter | — | 11 | ~1929 |
| John Carney | Son | — | 25 | ~1915 |
| Thomas Carney | Son | — | 23 | ~1917 |
| Richard Carney | Head | — | 60 | ~1880 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 14
Suffolk, Massachusetts · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carney |
| Given Name | John J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 25
Suffolk-County, Massachusetts · implied b. ~1915 — 8 household members
| Surname | Carney |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Class of Worker | 0 |
| Highest Grade | Hs 3 |
| 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 Carney across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Carney
Son · 1940 · age 25 · b. ~1915 · Massachusetts
★ You are viewing this record
Sibling
Warren Carney
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Carney
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Paul Carney
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Carney
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Carney
Sibling · 1940 · age 11
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-t0627-01664-00677)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alice P. Hurley | 10 | Daughter | — | Massachusetts |
| 42 | Helen M. Hurley | 7 | Daughter | — | Massachusetts |
| 43 | John Nuse | 40 | Head | — | Massachusetts |
| 44 | Adeline Nuse | 12 | Daughter | — | Massachusetts |
| 45 | Matthew May | 47 | Head | Fisherman | Newfoundland |
| 46 | Lillian May | 47 | Wife | — | Newfoundland |
| 47 | Regina May | 19 | Daughter | New Worker | Massachusetts |
| 48 | Mildred May | 16 | Daughter | — | Massachusetts |
| 49 | Elizabeth May | 14 | Daughter | — | Massachusetts |
| 50 | Mary May | 13 | Daughter | — | Massachusetts |
| 51 | Lillian May | 10 | Daughter | — | Massachusetts |
| 52 | John May | 6 | Son | — | Massachusetts |
| 53 | Margaret May | 3 | Daughter | — | Massachusetts |
| 54 | John Devine | 64 | Head | Laborer | Canada English |
| 55 | Mary Devine | 60 | Wife | — | Irish Free State |
| 56 | Daniel Devine | 28 | Son | — | Massachusetts |
| 57 | Vincent Devine | 24 | Son | Machinist | Massachusetts |
| 58 | Lawrence Devine | 22 | Son | Piecer | Massachusetts |
| 59 | Marguerite Devine | 19 | Daughter | — | Massachusetts |
| 60 | James Connolly | 45 | Head | Stock Clerk | Massachusetts |
| 61 | Anna Connolly | 42 | Wife | — | Massachusetts |
| 62 | Mary Connolly | 21 | Daughter | Stenographer | Massachusetts |
| 63 | Arthur Connolly | 17 | Son | — | Massachusetts |
| 64 | Harold Connolly | 15 | Son | — | Massachusetts |
| 65 | Daniel Connolly | 12 | Son | — | Massachusetts |
| 66 | Geraldine Connolly | 10 | Daughter | — | Massachusetts |
| 67 | Thomas Connolly | 7 | Son | — | Massachusetts |
| 68 | William Haynes | 50 | Head | Foreman | Massachusetts |
| 69 | Florence Haynes | 51 | Wife | — | Massachusetts |
| 70 | Florence Haynes | 27 | Daughter | — | Massachusetts |
| 71 | William D. Haynes | 19 | Son | Attendant | Massachusetts |
| 72 | Richard Carney | 60 | Head | Laborer | Pennsylvania |
| 73 | Margaret Carney | 54 | Wife | — | Massachusetts |
| 74 | John J. Carney THIS PERSON | 25 | Son | — | Massachusetts |
| 75 | Thomas J. Carney | 23 | Son | — | Massachusetts |
| 76 | Paul J. Carney | 21 | Son | — | Massachusetts |
| 77 | Richard J. Carney | 18 | Son | New Worker | Pennsylvania |
| 78 | Warren J. Carney | 15 | Son | — | Massachusetts |
| 79 | Helen Carney | 11 | Daughter | — | Massachusetts |
| 80 | Mario Martins | 44 | Head | Cook | Portugal |
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)