JH
John Hart — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Hart across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents William & Wm — first a son (b.~1916), then head of a 3-person household.
Age 24
b. ~1916
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Hart |
| Given Name | John E |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | bookkeeper |
| Industry | wholesale grocery |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 850 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Bookkeeper |
| Township / Ward | Boston |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Roy Hart | Son | — | 22 | ~1918 |
| John Hart | Son | — | 24 | ~1916 |
| Charlotte Hart | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 4
Suffolk, Massachusetts · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | John E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 14
Suffolk, Massachusetts · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hart |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Canada-English |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 24
Suffolk-County, Massachusetts · implied b. ~1916 — 3 household members
| Surname | Hart |
| Given Name | John E |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | bookkeeper |
| Industry | wholesale grocery |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 850 |
| 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 Hart across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Hart (~0.92 confidence) and father Wm Hart (~0.92 confidence) and mother Charlotte Hart (~0.92 confidence) and mother Charlotte Hart (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Hart
b. ~1876
Source father
● Household
· direct · ~0.92
Father
Wm Hart
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Charlotte Hart
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Charlotte Hart
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Hart
Son · 1940 · age 24 · b. ~1916 · Massachusetts
★ You are viewing this record
Sibling
Roy Hart
Sibling · 1940 · age 22
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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01674-00129)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charlotte E Hart | 57 | wife | — | Canada-Eng |
| 2 | John E Hart THIS PERSON | 24 | son | Bookkeeper | Massachusetts |
| 3 | Roy R Hart | 22 | son | Stenographer | Massachusetts |
| 4 | Murdock Campbell | 55 | head | Portable Engineer | Canada-Eng |
| 5 | Catherine Campbell | 47 | wife | — | Canada-Eng |
| 6 | Elmore Campbell | 21 | son | — | Massachusetts |
| 7 | Mary Campbell | 17 | daughter | Stenographer | Massachusetts |
| 8 | Sadie D Gouthro | 63 | head | — | Canada-Eng |
| 9 | George Gouthro | 33 | son | Elevator Operator | Canada-Eng |
| 10 | Frank J Byrns | 33 | head | Supply Clerk | Massachusetts |
| 11 | Margaret M Byrns | 33 | wife | — | Canada-Eng |
| 12 | Lorraine Byrns | 13 | adopted daughter | — | Massachusetts |
| 13 | Thomas E Flynn | 55 | head | Prison Officer | Massachusetts |
| 14 | Ida M Flynn | 50 | wife | — | Massachusetts |
| 15 | Thomas E Jr. Flynn | 25 | son | Lawyer | Massachusetts |
| 16 | Mary Flynn | 24 | daughter | School Teacher | Massachusetts |
| 17 | Donald Flynn | 17 | son | — | Massachusetts |
| 18 | Bridget Macdorman | 84 | lodger | — | Massachusetts |
| 19 | Percy E Norwood | 42 | head | Shipper | Maine |
| 20 | Ida E Norwood | 40 | wife | — | Maine |
| 21 | Helen Brough | 30 | lodger | Beautician | Massachusetts |
| 22 | James E Kelly | 67 | head | Carpenter | Canada-Eng |
| 23 | Annie C Kelly | 57 | wife | — | Canada-Eng |
| 24 | John Kelly | 27 | son | Elevator Operator | Massachusetts |
| 25 | Howard S Hinchley | 27 | head | Chemical Analyst | Massachusetts |
| 26 | Lillian Hinchley | 26 | wife | — | Massachusetts |
| 27 | Peter Galanopoulos | 50 | head | Propeller Polisher | Greece |
| 28 | Jennie Galanopoulos | 47 | wife | — | Greece |
| 29 | Ethel Galanopoulos | 20 | daughter | Business Machine Operator | Massachusetts |
| 30 | Dorothy Galanopoulos | 18 | daughter | New Worker | Massachusetts |
| 31 | Charles E Davis | 65 | head | — | Massachusetts |
| 32 | Emma A Davis | 91 | mother | — | Massachusetts |
| 33 | Nellie D Lawyer | 45 | head | — | Massachusetts |
| 34 | Mary Nash | 33 | lodger | Sampler | Irish Free State |
| 35 | Francis Albright | 20 | lodger | — | Massachusetts |
| 36 | Alphonous Kennedy | 18 | lodger | — | Massachusetts |
| 37 | Robert Bean | 12 | lodger | — | Massachusetts |
| 38 | Vernon Lothrop | 18 | lodger | — | Massachusetts |
| 39 | Extra Line | None | — | — | — |
| 40 | James J Finnevin | 59 | head | — | Irish Free State |
Pedigree Summary
John + 1 sibling
Gen 1 · 4 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)