JC
John Coffey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Coffey across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1908), then head of a 7-person household.
Age 32
b. ~1908
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Coffey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Malden City |
| Est. Birth Year | ~1908 |
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 |
|---|---|---|---|---|
| Catherine Coffey | Spouse | — | 65 | ~1875 |
| Catherine Coffey | Daughter | — | 31 | ~1909 |
| John Coffey | Son | — | 32 | ~1908 |
| William Coffey | Son | — | 27 | ~1913 |
| Julia Coffey | Daughter | — | 38 | ~1902 |
| Jeremiah Coffey | Head | — | 66 | ~1874 |
| James Coffey | Son | — | 36 | ~1904 |
Census Appearances
1930
Middlesex, Massachusetts
Other, age 21
Middlesex, Massachusetts · implied b. ~1909 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Coffey |
| Given Name | John J |
| Relationship to Head | Roomer |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Electrician |
| Industry | Rubber factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 32
Middlesex-County, Massachusetts · implied b. ~1908 — 7 household members
| Surname | Coffey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Malden city |
| 1935 Residence (County) | Middlesex |
| Hours Worked | 0 |
| 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 Coffey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Coffey
Son · 1940 · age 32 · b. ~1908 · Massachusetts
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Sibling
James Coffey
Sibling · 1940 · age 36
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Coffey
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Coffey
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julia Coffey
Sibling · 1940 · age 38
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-t0627-01609-00087)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward H. Russell | 42 | Head | Steel Engraver | Massachusetts |
| 2 | Mildred G. Russell | 37 | Wife | — | Maine |
| 3 | Perry Russell | 18 | Son | Lumper | Maine |
| 4 | Howard Russell | 17 | Son | — | Massachusetts |
| 5 | George D. Ratcliffe | 50 | Head | Machine Operator | Virginia |
| 6 | Mildred L. Ratcliffe | 22 | Wife | — | Massachusetts |
| 7 | Jeremiah Coffey | 66 | Head | — | Massachusetts |
| 8 | Catherine Coffey | 65 | Wife | — | Massachusetts |
| 9 | Julia Coffey | 38 | Daughter | Stenographer | Massachusetts |
| 10 | James Coffey | 36 | Son | — | Massachusetts |
| 11 | John Coffey THIS PERSON | 32 | Son | — | Massachusetts |
| 12 | Catherine D. Coffey | 31 | Daughter | Sales Clerk | Massachusetts |
| 13 | William Coffey | 27 | Son | Sales Clerk | Massachusetts |
| 14 | George H. Jones | 27 | Head | Driver | Massachusetts |
| 15 | Frances J. Jones | 28 | Wife | — | Massachusetts |
| 16 | Joseph A. Beaupre | 43 | Head | Tool Maker | France |
| 17 | Lola Beaupre | 40 | Wife | — | Maine |
| 18 | George L. Beaupre | 21 | Son | Bookkeeper | Massachusetts |
| 19 | Paul W. Beaupre | 19 | Son | Typist | Massachusetts |
| 20 | Rita C. Beaupre | 14 | Daughter | — | Massachusetts |
| 21 | Roger J. Beaupre | 12 | Son | — | Massachusetts |
| 22 | Helen B. Beaupre | 8 | Daughter | — | Massachusetts |
| 23 | Henry V. King | 36 | Head | Machinist | New York |
| 24 | Mary G. King | 31 | Wife | — | Massachusetts |
| 25 | James H. King | 2 | Son | — | Massachusetts |
| 26 | Charles S. Graft | 34 | Head | Night Guard | Massachusetts |
| 27 | Beatrice Graft | 29 | Wife | Telephone Operator | Massachusetts |
| 28 | Paul Sherman | 25 | Head | Sales Manager | Massachusetts |
| 29 | Sarah Sherman | 32 | Wife | Salesgirl | Massachusetts |
| 30 | Arthur Lavargna | 21 | Head | Sales Clerk | Massachusetts |
| 31 | Eleanor Lavargna | 18 | Wife | — | Massachusetts |
| 32 | Caswell, Henry Lavargna | 64 | Father-in-law | Spinning Hurricane Wood | Massachusetts |
| 33 | Lydia Lavargna | 59 | Mother-in-law | — | Massachusetts |
| 34 | Barbara Lavargna | 12 | Sister-in-law | — | Massachusetts |
| 35 | Olaf G. Hahne | 33 | Head | Painter | Sweden |
| 36 | Carin Hahne | 28 | Wife | — | Massachusetts |
| 37 | Stephen R. Hilliard | 55 | Head | First Class Electrician | Massachusetts |
| 38 | Helena J. Hilliard | 51 | Wife | — | Massachusetts |
| 39 | Eleanor F. Hilliard | 24 | Daughter | Stenographer | Massachusetts |
| 40 | Stephen R. Jr. Hilliard | 18 | Son | — | 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)