JC
John Carney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Carney across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 8-person household.
Age 15
b. ~1925
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Carney |
| Given Name | John J. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Reading Town |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Reading Town |
| Est. Birth Year | ~1925 |
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 |
|---|---|---|---|---|
| John Carney | Head | — | 45 | ~1895 |
| William Carney | Son | — | 4 | ~1936 |
| Christina Carney | Spouse | — | 42 | ~1898 |
| Margaret Carney | Daughter | — | 17 | ~1923 |
| Annie Carney | Daughter | — | 12 | ~1928 |
| Christina Carney | Daughter | — | 9 | ~1931 |
| Mary Carney | Daughter | — | 8 | ~1932 |
| John Carney | Son | — | 15 | ~1925 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 5
Middlesex, Massachusetts · implied b. ~1925 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Corney |
| Given Name | John J Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 15
Middlesex-County, Massachusetts · implied b. ~1925 — 8 household members
| Surname | Carney |
| Given Name | John J. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Reading Town |
| 1935 Residence (County) | Middlesex |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | H 1 |
| 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 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 15 · b. ~1925 · Massachusetts
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Sibling
Margaret Carney
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Christina Carney
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Annie Carney
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Carney
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Carney
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01617-00268)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alina L. Shane | 58 | Wife | — | Germany |
| 2 | Henry G. Shane | 24 | Son | Salesman | Massachusetts |
| 3 | Robert P. Shane | 22 | Son | Machinist Helper | Massachusetts |
| 4 | Olive L. Shane | 17 | Daughter | — | Massachusetts |
| 5 | John J. Carney | 45 | Head | Painter | Massachusetts |
| 6 | Christina M. Carney | 42 | Wife | — | New Hampshire |
| 7 | Margaret Carney | 17 | Daughter | — | Massachusetts |
| 8 | John J. Jr. Carney THIS PERSON | 15 | Son | — | Massachusetts |
| 9 | Annie P. Carney | 12 | Daughter | — | Massachusetts |
| 10 | Christina E. Carney | 9 | Daughter | — | Massachusetts |
| 11 | Mary V. Carney | 8 | Daughter | — | Massachusetts |
| 12 | William Carney | 4 | Son | — | Massachusetts |
| 13 | Cornelius Canty | 53 | Head | — | Massachusetts |
| 14 | Margaret D. Canty | 53 | Daughter | Teacher | Maine |
| 15 | Catherine Reilly | 64 | H.keeper | Housekeeper | Ireland |
| 16 | Anthony Silva | 25 | Head | Service Man | Massachusetts |
| 17 | Kathryn Silva | 25 | Wife | — | Massachusetts |
| 18 | Joan E. Silva | 3 | Daughter | — | Massachusetts |
| 19 | Muriel Castine | 25 | Boarder | — | Massachusetts |
| 20 | Edward W. Treacy | 11 | Boarder | — | Massachusetts |
| 21 | Benjamin Munroe | 41 | Head | Elevator Operator | Canada French |
| 22 | Sylvia Munroe | 39 | Wife | Short Order Cook | Canada French |
| 23 | Elizabeth Munroe | 19 | Daughter | Mechanic Helper | Canada French |
| 24 | Helena Munroe | 18 | Daughter | — | Canada French |
| 25 | Alfred Munroe | 17 | Son | New Worker | Massachusetts |
| 26 | Adelle Munroe | 15 | Son | — | Massachusetts |
| 27 | Rosella Munroe | 14 | Daughter | — | Massachusetts |
| 28 | Marion Munroe | 12 | Daughter | — | Massachusetts |
| 29 | Henry Munroe | 9 | Son | — | Massachusetts |
| 30 | Robert Munroe | 5 | Son | — | Massachusetts |
| 31 | John R. Dulong | 70 | Head | Laborer | Canada French |
| 32 | Mary C. Dulong | 77 | Wife | Laborer | Canada French |
| 33 | George H. Dulong | 51 | Son | — | Canada French |
| 34 | John S. Dulong | 37 | Son | Landscape Gardener | Massachusetts |
| 35 | Clarence N. Dulong | 35 | Son | Laborer | Massachusetts |
| 36 | Carl Heuston | 46 | Head | Welder | Massachusetts |
| 37 | Mary Heuston | 45 | Wife | — | Canada French |
| 38 | Margaret Heuston | 23 | Daughter | — | Massachusetts |
| 39 | Israel Heuston | 21 | Son | Private | Massachusetts |
| 40 | Henry Heuston | 20 | Son | Radio Operator | Massachusetts |
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)