JH
John Healy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Healy across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1905), then head of a 8-person household.
Age 35
b. ~1905
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Healy |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville (City) |
| Additional Details | |
| Occupation | Master |
| Industry | Elementary Schools |
| Class of Worker | GW |
| Hours Worked | 35 |
| Highest Grade | C 4 |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Master |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1905 |
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 |
|---|---|---|---|---|
| Catherine Healy | Daughter | — | 26 | ~1914 |
| Margaret Healy | Daughter | — | 30 | ~1910 |
| Ann Healy | Daughter | — | 22 | ~1918 |
| Daniel Healy | Head | — | 60 | ~1880 |
| Robert Healy | Son | — | 20 | ~1920 |
| John Healy | Son | — | 35 | ~1905 |
| Joseph Healy | Son | — | 28 | ~1912 |
| Margaret Healy | Spouse | — | 58 | ~1882 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 24
Suffolk, Massachusetts · implied b. ~1906 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Heely |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Manager |
| Industry | Gas Station |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 35
Middlesex-County, Massachusetts · implied b. ~1905 — 8 household members
| Surname | Healy |
| Given Name | John H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville (City) |
| Occupation | Master |
| Industry | Elementary Schools |
| Class of Worker | GW |
| Hours Worked | 35 |
| Highest Grade | C 4 |
| 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 Healy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Healy
Son · 1940 · age 35 · b. ~1905 · Massachusetts
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Sibling
Robert Healy
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Healy
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Healy
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Healy
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Healy
Sibling · 1940 · age 26
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
39 people indexed on this census page (nara:1940:m-t0627-01704-00258)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John P. Fitzgerald | 31 | Son | Truck Driver | Massachusetts |
| 2 | Marion C. Nelley | 27 | Head | Toy Finisher | Massachusetts |
| 3 | Walter Rice | 25 | Brother | Paint Sprayer | Massachusetts |
| 4 | George Rice | 20 | Brother | Paint Sprayer Helper | Maine |
| 5 | Mary Mccluskey | 61 | Head | — | Northern Ireland |
| 6 | William J. Mccluskey | 32 | Son | Lawyer | Massachusetts |
| 7 | Michael J. O'Connell | 47 | Brother | Laborer | New York |
| 8 | John E. Amalaw | 31 | Son-in-law | Salesman | Massachusetts |
| 9 | Rose Amalaw | 29 | Daughter | — | Massachusetts |
| 10 | Mary Amalaw | 5 | Granddaughter | — | Massachusetts |
| 11 | Elizabeth Amalaw | 3 | Granddaughter | — | Massachusetts |
| 12 | Michael Amalaw | 1 | Grandson | — | Massachusetts |
| 13 | Virginia Amalaw | 0 | Granddaughter | — | Massachusetts |
| 14 | Clarence W. Sprague | 73 | Head | Clerk | Massachusetts |
| 15 | Georgiana Sprague | 67 | Wife | — | Massachusetts |
| 16 | Henry J. Ingersoll | 44 | Head | Turner | Maine |
| 17 | Lillian F. Ingersoll | 47 | Wife | — | Irish Free State |
| 18 | Margaret Ingersoll | 21 | Daughter | Operator | Massachusetts |
| 19 | Desumner J. Cass | 45 | Head | Marine Engineer | Massachusetts |
| 20 | Mary H. Cass | 46 | Wife | — | Canada English |
| 21 | Desumner Jr. Cass | 13 | Son | — | Massachusetts |
| 22 | James Cass | 10 | Son | — | Massachusetts |
| 23 | Leona M. Cass | 8 | Daughter | — | Massachusetts |
| 24 | Daniel J. Healy | 60 | Head | Freight Handler | Irish Free State |
| 25 | Margaret Healy | 58 | Wife | — | Irish Free State |
| 26 | John H. Healy THIS PERSON | 35 | Son | Master | Massachusetts |
| 27 | Margaret B. Healy | 30 | Daughter | Telephone Operator | Massachusetts |
| 28 | Joseph F. Healy | 28 | Son | Laborer | Massachusetts |
| 29 | Catherine T. Healy | 26 | Daughter | Telephone Operator | Massachusetts |
| 30 | Ann M. Healy | 22 | Daughter | — | Massachusetts |
| 31 | Robert L. Healy | 20 | Son | Student | Massachusetts |
| 32 | Dervini A. Maillet | 42 | Head | Druggist | Massachusetts |
| 33 | Emma L. Maillet | 44 | Wife | — | Massachusetts |
| 34 | Elsie M. Lally | 46 | Sister-in-law | Beautician | Massachusetts |
| 35 | Lester H. O. Jackson | 61 | Head | Salesman | Maine |
| 36 | Celia E. Jackson | 58 | Wife | — | New Hampshire |
| 37 | Everett H. Hurd | 50 | Head | Floorman | Massachusetts |
| 38 | Carrie E. Hurd | 67 | Wife | — | New Hampshire |
| 39 | Ruth E. Hurd | 17 | Daughter | Student | 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)