JD
John Day — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Day across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 8-person household.
Age 70
b. ~1870
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Day |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston CITY |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1870 |
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 |
|---|---|---|---|---|
| Bessie Day | Daughter | — | 43 | ~1897 |
| John Day | Head | — | 70 | ~1870 |
| John Day | Other | — | 22 | ~1918 |
| Marion Day | Other | — | 41 | ~1899 |
| Fred Day | Other | — | 20 | ~1920 |
| Fred Carpenter | Other | — | 52 | ~1888 |
| Frank Day | Son | — | 45 | ~1895 |
| Anna Day | Spouse | — | 62 | ~1878 |
Census Appearances
1920
Suffolk, Massachusetts
Head, age 50
Suffolk, Massachusetts · implied b. ~1870 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | John H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Bookkeeper |
| Industry | Paper |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Head, age 65
Suffolk, Massachusetts · implied b. ~1865 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | John J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 27 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Ticket Agent |
| Industry | Steam Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 3500 |
| Radio Set | R |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Head, age 70
Suffolk-County, Massachusetts · implied b. ~1870 — 8 household members
| Surname | Day |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston CITY |
| 1935 Residence (County) | Suffolk |
| Income (1939) | 0 |
| 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 Day across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Day
Head · 1940 · age 70 · b. ~1870 · Massachusetts
★ You are viewing this record
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-t0627-01682-00409)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Gordon K. Griffin | 35 | Head | Wholesale Salesman | Massachusetts |
| 2 | Althea F. Griffin | 23 | Wife | — | Massachusetts |
| 3 | Arline P. Griffin | 5 | daughter | — | New Jersey |
| 4 | Gary K. Griffin | 2 | son | — | Massachusetts |
| 5 | Ella H. Underhill | 53 | Head | — | English Canada |
| 6 | Ruth Underhill | 25 | daughter | New Worker | Massachusetts |
| 7 | Lillian H. Minella | 36 | daughter | — | English Canada |
| 8 | Robert E. Minella | 15 | grandson | — | Massachusetts |
| 9 | Lillian H. Minella | 13 | granddaughter | — | Massachusetts |
| 10 | Janet C. Minella | 6 | granddaughter | — | Massachusetts |
| 11 | Lora J. Thornton | 31 | daughter | Stenographer | Massachusetts |
| 12 | Prudence M. Thornton | 10 | granddaughter | — | Massachusetts |
| 13 | Harold C. Watson | 36 | son in law | Switch Boarder | Maine |
| 14 | Adele Watson | 27 | daughter | — | Massachusetts |
| 15 | Nancy A. Watson | 10 | granddaughter | — | Massachusetts |
| 16 | Donald E. Watson | 9 | grandson | — | Massachusetts |
| 17 | John F. Day THIS PERSON | 70 | Head | — | Massachusetts |
| 18 | Anna H. Day | 62 | Wife | — | Canada English |
| 19 | Frank E. Day | 45 | son | Foreman | Massachusetts |
| 20 | Marion H. Day | 41 | daughter in law | — | Connecticut |
| 21 | John L. Day | 22 | adopted son | Estimator | Massachusetts |
| 22 | Fred L. Day | 20 | grandson | Hoisting Engineer | Massachusetts |
| 23 | Bessie Day | 43 | daughter | — | Massachusetts |
| 24 | Fred H. Carpenter | 52 | Lodger | Signal Service | Massachusetts |
| 25 | (Extra Line) | None | — | — | — |
| 26 | Martin J. Hussey | 58 | Head | Parts Manager | Massachusetts |
| 27 | Etta M. Hussey | 55 | Wife | — | Massachusetts |
| 28 | Kenneth Hussey | 29 | son | — | Massachusetts |
| 29 | Cameron C. Pratt | 28 | son in law | Asst. Mgr. | English Canada |
| 30 | Audrey E. Pratt | 28 | daughter | — | Massachusetts |
| 31 | Charles C. Pratt | 5 | grandson | — | Massachusetts |
| 32 | Norma Gene Pratt | 0 | granddaughter | — | Massachusetts |
| 33 | John S. Morrissey | 26 | son in law | Retail Salesman | Massachusetts |
| 34 | Madeline F. Morrissey | 25 | daughter | — | Massachusetts |
| 35 | Audrey Ann Morrissey | 5 | granddaughter | — | Massachusetts |
| 36 | Ronald N. Morrissey | 6 | grandson | — | Massachusetts |
| 37 | Jessie R. No Persons | 63 | Head | — | Massachusetts |
| 38 | Eleanor T. Devlin | 60 | Head | — | Massachusetts |
| 39 | Mary L. Devlin | 28 | daughter | Tutor | Massachusetts |
| 40 | Elinor R. Devlin | 29 | daughter | Asst. Librarian | 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)