JH
John Hopkins — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Hopkins across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1920), then head of a 4-person household.
Age 20
b. ~1920
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Hopkins |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Bus boy |
| Industry | Hotel |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 770 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Bus Boy |
| Township / Ward | Boston 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Hopkins | Head | — | 46 | ~1894 |
| John Hopkins | Son | — | 20 | ~1920 |
| Herbert Hopkins | Son | — | 16 | ~1924 |
| Mary Hopkins | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age
Middlesex, Massachusetts · implied b. ~1920 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hopkins |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 10
Middlesex, Massachusetts · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hopkins |
| Given Name | John Jr. |
| 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
Suffolk-County, Massachusetts
Son, age 20
Suffolk-County, Massachusetts · implied b. ~1920 — 4 household members
| Surname | Hopkins |
| Given Name | John Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Bus boy |
| Industry | Hotel |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 770 |
| Highest Grade | Hs 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 Hopkins across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Hopkins (~0.92 confidence) and father John Hopkins (~0.92 confidence) and mother Mary Hopkins (~0.92 confidence) and father John Hopkins (~0.92 confidence) and mother Mary Hopkins (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Hopkins
b. ~1888
Source father
● Household
· direct · ~0.92
Father
John Hopkins
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Mary Hopkins
b. ~1893
Source mother
● Household
· direct · ~0.92
Father
John Hopkins
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Mary Hopkins
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Hopkins
Son · 1940 · age 20 · b. ~1920 · Massachusetts
★ You are viewing this record
Sibling
Herbert Hopkins
Sibling · 1940 · age 16
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-t0627-01663-00836)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Clarence Nado | 34 | Head | Investigator | Massachusetts |
| 2 | Alice Nado | 32 | Wife | Dictaphone | Massachusetts |
| 3 | Eleanor Gaw | 43 | Head | Bookkeeper | Massachusetts |
| 4 | Alfred Twombley | 30 | Head | Auditor | New Hampshire |
| 5 | Dorothy Twombley | 33 | Wife | — | Maine |
| 6 | Richard Twombley | 3 | Son | — | Massachusetts |
| 7 | John Rice | 24 | Head | Doctor | Massachusetts |
| 8 | Nancy Rice | 23 | Wife | — | Illinois |
| 9 | Marion Dixon | 34 | Head | Clerk-Record | Massachusetts |
| 10 | John Hopkins | 46 | Head | Salesman | Massachusetts |
| 11 | Mary Hopkins | 45 | Wife | — | Massachusetts |
| 12 | John Jr Hopkins THIS PERSON | 20 | Son | Bus Boy | Massachusetts |
| 13 | Herbert Hopkins | 16 | Son | Messenger | Massachusetts |
| 14 | George Strahan | 38 | Head | Manager | Massachusetts |
| 15 | Ann Strahan | 37 | Wife | — | Massachusetts |
| 16 | Paul Richardson | 26 | Head | Clerk-Invoice | Massachusetts |
| 17 | Ellen Richardson | 23 | Wife | — | Massachusetts |
| 18 | William Ryan | 25 | Head | Salesman | Massachusetts |
| 19 | Evelyn Ryan | 25 | Wife | Secretary | Massachusetts |
| 20 | Morris Twombley | 30 | Head | Advertising Mgr | Massachusetts |
| 21 | Martha Twombley | 30 | Wife | — | Massachusetts |
| 22 | Jane Twombley | 4 | Daughter | — | Massachusetts |
| 23 | James Macvicar | 47 | Head | Custodian | Canada Eng |
| 24 | Elizabeth Macvicar | 47 | Wife | — | Canada Eng |
| 25 | Samuel Lipsky | 72 | Head | — | Massachusetts |
| 26 | Rebecca Lipsky | 70 | Wife | — | Massachusetts |
| 27 | Edward Cobleigh | 27 | Head | Clerk-Sales | Massachusetts |
| 28 | Veronica Cobleigh | 29 | Wife | Clerk-Sales | Massachusetts |
| 29 | Alice Ayers | 42 | Head | Salesgirl | Massachusetts |
| 30 | Robert Ayers | 21 | Son | Salesman | Massachusetts |
| 31 | Ralph Aubert | 32 | Head | Machinist | New Hampshire |
| 32 | Joan Aubert | 42 | Wife | — | England |
| 33 | Edmund Dickson | 46 | Head | Pharmacist | Maine |
| 34 | Mildred Dickson | 46 | Wife | Checking | Pennsylvania |
| 35 | Joyce Dickson | 18 | Daughter | — | Maine |
| 36 | Catherine Welch | 68 | Head | — | Virginia |
| 37 | William Welch | 29 | Son | Clerical Work | Massachusetts |
| 38 | Mary Welch | 30 | Daughter | Clerical Work | Massachusetts |
| 39 | Carolyn Dinsmore | 58 | Head | Clerical Work | Massachusetts |
| 40 | Mary Redman | 31 | Head | Beautician | Massachusetts |
Pedigree Summary
John + 1 sibling
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)