JG
John Griffin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this John Griffin across the 1920, 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1908), then head of a 2-person household.
Age 32
b. ~1908
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Haverhill City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Occupation | Interne |
| Industry | Hotel |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Interne |
| Township / Ward | Haverhill City |
| Est. Birth Year | ~1908 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Katherine Griffin | Head | — | 51 | ~1889 |
| John Griffin | Son | — | 32 | ~1908 |
Census Appearances
1920
Essex, Massachusetts
Son, age 12
Essex, Massachusetts · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Son, age 22
Essex, Massachusetts · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Driver |
| Industry | Laundry Truck |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Son, age 32
Essex-County, Massachusetts · implied b. ~1908 — 2 household members
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Haverhill City |
| 1935 Residence (County) | Essex |
| Occupation | Interne |
| Industry | Hotel |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 0 |
| Highest Grade | C 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 Griffin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Griffin (~0.92 confidence) and father Thomas Griffin (~0.92 confidence) and mother Katherine Griffin (~0.92 confidence) and mother Catherine Griffin (~0.92 confidence) and mother Katherine Griffin (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Griffin
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Thomas Griffin
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Katherine Griffin
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Catherine Griffin
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Katherine Griffin
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Griffin
Son · 1940 · age 32 · b. ~1908 · 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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
26 people indexed on this census page (nara:1940:m-t0627-01581-00097)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George Mason | 42 | Head | — | Massachusetts |
| 42 | Clara Mason | 37 | Wife | — | Massachusetts |
| 43 | Cancelled | None | — | — | — |
| 44 | Richard C. Stanson | 70 | Head | Polishing | Massachusetts |
| 45 | Harry Stanson | 36 | Son | Polishing | England |
| 46 | Irene L. Doucette | 33 | Lodger | Housekeeper | Canada French |
| 47 | Elmer Littlefield | 45 | Head | Cutter | Massachusetts |
| 48 | Irene Littlefield | 44 | Wife | — | Minnesota |
| 49 | John Littlefield | 10 | Son | — | Minnesota |
| 50 | Cancelled | None | — | — | — |
| 51 | Albert Mckenney | 60 | Head | — | Maine |
| 52 | Albert Jameson | 19 | Lodger | Truck Driver | South Dakota |
| 53 | Arthur Buchikas | 54 | Head | — | Greece |
| 54 | Stella Buchikas | 54 | Wife | — | Greece |
| 55 | George Buchikas | 23 | Son | Wood Heeler | Massachusetts |
| 56 | James Mcdonald | 34 | Head | Manager | Massachusetts |
| 57 | Mary Mcdonald | 32 | Wife | — | Massachusetts |
| 58 | William O'Connell | 54 | Head | — | Massachusetts |
| 59 | Katie O'Connell | 50 | Wife | — | Massachusetts |
| 60 | Katherine Griffin | 51 | Head | — | Massachusetts |
| 61 | John Griffin THIS PERSON | 32 | Son | Interne | Massachusetts |
| 62 | William Hamill | 52 | Head | Contractor | Massachusetts |
| 63 | Barbara Hamill | 45 | Wife | — | Massachusetts |
| 64 | Annie Helena Ryan | 67 | Head | Supervisor | Massachusetts |
| 65 | P. Edward Brennan | 59 | Head | Truck Driver | Massachusetts |
| 66 | Mary B. Brennan | 64 | Wife | — | New Hampshire |
Pedigree Summary
John
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)