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.~1920), then head of a 8-person household.
Age 20
b. ~1920
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Carney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Arlington Town |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | New Worker |
| Hours Worked | 58 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | New Worker |
| Township / Ward | Arlington Town |
| Est. Birth Year | ~1920 |
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 |
|---|---|---|---|---|
| Richard Carney | Son | — | 12 | ~1928 |
| Alice Carney | Daughter | — | 15 | ~1925 |
| Mary Carney | Spouse | — | 49 | ~1891 |
| Charles Carney | Son | — | 8 | ~1932 |
| John Carney | Son | — | 20 | ~1920 |
| James Carney | Head | — | 53 | ~1887 |
| Paul Carney | Son | — | 23 | ~1917 |
| Leo Carney | Son | — | 11 | ~1929 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 10
Middlesex, Massachusetts · implied b. ~1920 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New York State |
| Mother's Birthplace | New York State |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 20
Middlesex-County, Massachusetts · implied b. ~1920 — 8 household members
| Surname | Carney |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Arlington Town |
| 1935 Residence (County) | Middlesex |
| Occupation | New Worker |
| Hours Worked | 58 |
| 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 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 20 · b. ~1920 · Massachusetts
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Sibling
Paul Carney
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Carney
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Carney
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leo Carney
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Carney
Sibling · 1940 · age 15
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-t0627-01601-00563)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jay Warren Lippert | 35 | Head | Shop Worker | Pennsylvania |
| 2 | Jean Lippert | 33 | Wife | — | Canada-English |
| 3 | Linda Lippert | 3 | Daughter | — | Massachusetts |
| 4 | John D. Haverstock | 30 | Brother-in-law | Shop Worker | Canada-English |
| 5 | Freeman Haverstock | 83 | Father-in-law | — | Canada-English |
| 6 | Frederick Frey | 50 | Head | Machinist | Massachusetts |
| 7 | Hazel B. Frey | 45 | Wife | — | Massachusetts |
| 8 | H. Warren Rutherford | 50 | Head | Teller | Massachusetts |
| 9 | Eleanor D. Rutherford | 48 | Wife | — | Massachusetts |
| 10 | Janet C. Rutherford | 20 | Daughter | — | Massachusetts |
| 11 | Esther H. Downing | 51 | Sister-in-law | Artist | Massachusetts |
| 12 | Thomas D. Deyoung | 74 | Head | — | Canada-English |
| 13 | Mary Jane Deyoung | 75 | Wife | — | Canada-English |
| 14 | Jane C. Deyoung | 42 | Daughter | Secretary | Canada-English |
| 15 | Lillian Gould | 13 | Lodger | — | Massachusetts |
| 16 | Edward H. Cunningham | 64 | Head | Painter | Massachusetts |
| 17 | Rosanna Cunningham | 59 | Wife | — | Massachusetts |
| 18 | Rosanna Craig | 34 | Daughter | — | Massachusetts |
| 19 | Anne Marie Craig | 3 | Granddaughter | — | Massachusetts |
| 20 | Julia Cunningham | 29 | Daughter | Salesgirl | Massachusetts |
| 21 | John J. Collins | 55 | Head | Foreman | Irish Free State |
| 22 | Mary E. Collins | 51 | Wife | — | Massachusetts |
| 23 | William Collins | 23 | Son | — | Massachusetts |
| 24 | James R. Powers | 65 | Head | Messenger | New York |
| 25 | Helen B. Powers | 65 | Wife | — | New York |
| 26 | John R. Powers | 26 | Son | Accountant | New York |
| 27 | James J. Carney | 53 | Head | Telegrapher | Massachusetts |
| 28 | Mary A. Carney | 49 | Wife | — | Massachusetts |
| 29 | Paul M. Carney | 23 | Son | Ticket Agent | Massachusetts |
| 30 | Alice Carney | 15 | Daughter | — | Massachusetts |
| 31 | John Carney THIS PERSON | 20 | Son | New Worker | Massachusetts |
| 32 | Richard Carney | 12 | Son | — | Massachusetts |
| 33 | Leo Carney | 11 | Son | — | Massachusetts |
| 34 | Charles Carney | 8 | Son | — | Massachusetts |
| 35 | Peter Pearson | 65 | Head | Iron Molder | Sweden |
| 36 | Hulda Pearson | 54 | Wife | — | Sweden |
| 37 | Catherine A. Dooner | 35 | Lodger | Teacher | Massachusetts |
| 38 | Lilla Iris Brown | 35 | Lodger | Teacher | Rhode Island |
| 39 | Dorothy Burbank | 31 | Lodger | Teacher | Massachusetts |
| 40 | Lois (A.) Park | 32 | Lodger | Teacher | 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)