JH
John Hardy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Hardy across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents John & Elizabeth — first a son (b.~1916), then head of a 5-person household.
Age 24
b. ~1916
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Hardy |
| Given Name | John J. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Salesman |
| Industry | First National Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1600 |
| Highest Grade | Hs 4 |
| 1935 Residence | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Salesman |
| Township / Ward | Watertown Town |
| Est. Birth Year | ~1916 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Catherine Hardy | Daughter | — | 21 | ~1919 |
| Dorothy Hardy | Daughter | — | 26 | ~1914 |
| John Hardy | Head | — | 59 | ~1881 |
| John Hardy | Son | — | 24 | ~1916 |
| Catherine Hardy | Spouse | — | 52 | ~1888 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 4
Middlesex, Massachusetts · implied b. ~1916 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hardy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | England |
| Mother's Birthplace | New Jersey |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 14
Middlesex, Massachusetts · implied b. ~1916 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hardy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | England |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 24
Middlesex-County, Massachusetts · implied b. ~1916 — 5 household members
| Surname | Hardy |
| Given Name | John J. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville |
| 1935 Residence (County) | Middlesex |
| Occupation | Salesman |
| Industry | First National Store |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1600 |
| Highest Grade | Hs 4 |
| 1935 Residence | Massachusetts |
| 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 Hardy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Hardy (~0.92 confidence) and mother Elizabeth Hardy (~0.92 confidence) and father William Hardy (~0.92 confidence) and father William Hardy (~0.92 confidence) and mother Catherine Hardy (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Hardy
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Hardy
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
William Hardy
b. ~1883
Source father
● Household
· direct · ~0.92
Father
William Hardy
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Catherine Hardy
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Hardy
Son · 1940 · age 24 · b. ~1916 · Massachusetts
★ You are viewing this record
Sibling
Dorothy Hardy
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Hardy
Sibling · 1940 · age 21
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-t0627-01601-00513)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ruth A. Herring Jr. | 28 | Wife | — | Massachusetts |
| 42 | Carol R. Herring Jr. | 4 | Daughter | — | Massachusetts |
| 43 | James C. Macleod | 45 | Head | Operator | Canada-English |
| 44 | Myrtle M. Macleod | 40 | Wife | Saleswoman | Rhode Island |
| 45 | Keith B. Macleod | 13 | Son | — | Massachusetts |
| 46 | Doris V. Macleod | 9 | Daughter | — | Massachusetts |
| 47 | John D. Gilbert | 32 | Head | Printer | Massachusetts |
| 48 | Gertrude E. Gilbert | 30 | Wife | — | Massachusetts |
| 49 | A. V. Fernandes | 37 | Lodger | Printer | Massachusetts |
| 50 | Fernandes | 30 | Wife | — | Massachusetts |
| 51 | Helen Onanian | 53 | Head | — | Armenia |
| 52 | Robert Onanian | 29 | Son | Upholsterer | California |
| 53 | Keith Onanian | 28 | Son | Plumber | California |
| 54 | Sarah Onanian | 26 | Daughter | Clerk | California |
| 55 | Victoria Onanian | 21 | Daughter | — | Massachusetts |
| 56 | Richard A. Onanian | 12 | Son | — | Massachusetts |
| 57 | Bachadur Mazmanian | 46 | Head | Tailor | Armenia |
| 58 | Tergue H. Mazmanian | 36 | Wife | — | Massachusetts |
| 59 | Beatrice A. Mazmanian | 13 | Daughter | — | Massachusetts |
| 60 | Gregory K. Mazmanian | 11 | Son | — | Massachusetts |
| 61 | Mazmanian | 43 | Brother | Tailor | Armenia |
| 62 | John J. Hardy | 59 | Head | Printer | Massachusetts |
| 63 | Catherine A. Hardy | 52 | Wife | — | Massachusetts |
| 64 | Dorothy A. Hardy | 26 | Daughter | Book-Keeper | Massachusetts |
| 65 | John J. Jr. Hardy THIS PERSON | 24 | Son | Salesman | Massachusetts |
| 66 | Catherine A. Hardy | 21 | Daughter | Payroll Typist | Massachusetts |
| 67 | Paul O. Thurston | 28 | Head | Chemical Engineer | Massachusetts |
| 68 | Katherine C. Thurston | 25 | Wife | — | Maine |
| 69 | Gordon S. Thurston | 2 | Son | — | Massachusetts |
| 70 | Robert C. Thurston | 1 | Son | — | Massachusetts |
| 71 | Selina Lyons | 38 | Head | — | Canada-English |
| 72 | John V. Lyons | 11 | Son | — | Massachusetts |
| 73 | Maurice M. Lyons | 9 | Son | — | Massachusetts |
| 74 | David D. Lyons | 6 | Son | — | Massachusetts |
| 75 | William F. Green | 34 | Head | Mechanic | Massachusetts |
| 76 | Catherine M. Green | 26 | Wife | — | Massachusetts |
| 77 | Mary E. Green | 5 | Daughter | — | Massachusetts |
| 78 | Catherine M. Green | 3 | Daughter | — | Massachusetts |
| 79 | Ellen A. Green | 1 | Daughter | — | Massachusetts |
| 80 | Verna K. Porter | 51 | Mother-in-law | — | Maine |
Related Census Records
Pedigree Summary
John + 2 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)