JH
John Heath — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Heath 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 | Heath |
| Given Name | John L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | C-1 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Somerville City |
| 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 |
|---|---|---|---|---|
| Margaret Ryan | Other | — | 25 | ~1915 |
| Genevieve Heath | Spouse | — | 48 | ~1892 |
| Leslie Heath | Head | — | 50 | ~1890 |
| Mary Heath | Daughter | — | 17 | ~1923 |
| Jean Heath | Daughter | — | 8 | ~1932 |
| Thomas Heath | Son | — | 19 | ~1921 |
| Ernest Quinn | Other | — | 35 | ~1905 |
| John Heath | Son | — | 20 | ~1920 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 10
Middlesex, Massachusetts · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Heath |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| 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 | Heath |
| Given Name | John L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Highest Grade | C-1 |
| 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 Heath across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Heath
Son · 1940 · age 20 · b. ~1920 · Massachusetts
★ You are viewing this record
Sibling
Thomas Heath
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Heath
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Heath
Sibling · 1940 · age 8
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-t0627-01703-00047)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Wallace F. Campbell | 23 | Son | Laborer | Massachusetts |
| 2 | Caspera D. Johansen | 70 | Head | — | Norway |
| 3 | Arthur W. Johansen | 42 | Son | Proprietor | Massachusetts |
| 4 | Arthur W. Johansen | 18 | Son | — | Massachusetts |
| 5 | Elmer J. Johansen | 17 | Son | — | Massachusetts |
| 6 | George E. White | 49 | Head | Laborer | Massachusetts |
| 7 | Margaret A. White | 49 | Wife | — | Massachusetts |
| 8 | Vaughan J. White | 65 | Boarder | — | Massachusetts |
| 9 | Cochran Harry White | 60 | Boarder | — | Massachusetts |
| 10 | Buckley Joseph F. White | 37 | Boarder | Peddler | Massachusetts |
| 11 | Michael O'Brien | 76 | Head | — | Eire |
| 12 | Margaret O'Brien | 74 | Wife | — | Eire |
| 13 | James E. O'Brien | 42 | Son | Laborer | Massachusetts |
| 14 | Vincent D. O'Brien | 36 | Son | Roofer | Massachusetts |
| 15 | Timothy M. O'Brien | 31 | Son | Chauffeur | Massachusetts |
| 16 | Rose Gautereau | 70 | Head | — | Canada English |
| 17 | Edith B. Davidson | 65 | Head | Proprietor | Canada English |
| 18 | Lester W. Davidson | 41 | Son | Chauffeur | Massachusetts |
| 19 | Mary H. Mcphail | 36 | Sister | Nurse | Canada English |
| 20 | Pearl F. Mccomb | 21 | Boarder | Packer | Massachusetts |
| 21 | Albert L. Sullivan | 31 | Head | Custodian | Massachusetts |
| 22 | Adelaide M. Sullivan | 28 | Wife | — | Massachusetts |
| 23 | Albert W. Sullivan | 0 | Son | — | Massachusetts |
| 24 | Leslie J. Heath | 50 | Head | Proprietor | Massachusetts |
| 25 | Genevieve Heath | 48 | Wife | — | Massachusetts |
| 26 | John L. Heath THIS PERSON | 20 | Son | — | Massachusetts |
| 27 | Thomas J. Heath | 19 | Son | — | Massachusetts |
| 28 | Mary L. Heath | 17 | Daughter | — | Massachusetts |
| 29 | Jean F. Heath | 8 | Daughter | — | Massachusetts |
| 30 | Ernest Quinn | 35 | Boarder | Laborer | Massachusetts |
| 31 | Margaret Ryan | 25 | Boarder | Nurse | Massachusetts |
| 32 | Dennis T. Belonin | 42 | Head | Chauffeur | Massachusetts |
| 33 | Mary F. Belonin | 42 | Wife | — | Massachusetts |
| 34 | Anna A. Belonin | 15 | Daughter | — | Massachusetts |
| 35 | Francis D. Belonin | 13 | Son | — | Massachusetts |
| 36 | Edward J. Belonin | 12 | Son | — | Massachusetts |
| 37 | Florence Belonin | 10 | Daughter | — | Massachusetts |
| 38 | Richard Belonin | 9 | Son | — | Massachusetts |
| 39 | Charles Belonin | 8 | Son | — | Massachusetts |
| 40 | Anna A. Quinn | 36 | Sister-in-law | Inspector | 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)