JG
John Griffin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Worcester-County, Massachusetts
Our Model Tree links this John Griffin across the 1920, 1930 and 1940 US Censuses in Worcester-County, Massachusetts (XGBoost, ~Confirmed), with identified parents John & Hannah — 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 | Worcester-County, Massachusetts |
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Worcester city |
| 1935 Residence (County) | Worcester |
| Additional Details | |
| Highest Grade | C 2 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Worcester 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 |
|---|---|---|---|---|
| Margaret Griffin | Daughter | — | 13 | ~1927 |
| John Griffin | Head | — | 55 | ~1885 |
| John Griffin | Son | — | 20 | ~1920 |
| Hannah Griffin | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Worcester, Massachusetts
Son, age 1
Worcester, Massachusetts · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Ireland |
| Mother Tongue | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Worcester, Massachusetts
Son, age 11
Worcester, Massachusetts · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Ireland (north) |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Worcester-County, Massachusetts
Son, age 20
Worcester-County, Massachusetts · implied b. ~1920 — 4 household members
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Worcester city |
| 1935 Residence (County) | Worcester |
| Highest Grade | C 2 |
| 1935 Residence | Same house |
| 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 John Griffin (~0.92 confidence) and mother Hannah Griffin (~0.92 confidence) and father Francis Griffin (~0.92 confidence) and father Frank Griffin (~0.92 confidence) and mother Anna Griffin (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Griffin
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Hannah Griffin
b. ~1887
Source mother
● Household
· direct · ~0.92
Father
Francis Griffin
b. ~1894
Source father
● Household
· direct · ~0.92
Father
Frank Griffin
b. ~1895
Source father
● Household
· direct · ~0.92
Mother
Anna Griffin
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Griffin
Son · 1940 · age 20 · b. ~1920 · Massachusetts
★ You are viewing this record
Sibling
Margaret Griffin
Sibling · 1940 · age 13
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 — Worcester-County, Massachusetts
Open full size
1940 US Federal Census — Worcester-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01718-00236)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marie Burke | 21 | daughter | Stenographer | Massachusetts |
| 2 | Margaret Burke | 17 | daughter | — | Massachusetts |
| 3 | Maurice O'Toole | 46 | boarder | — | Massachusetts |
| 4 | Ronald Mason | 36 | head | Draftsman | Massachusetts |
| 5 | Loretta Mason | 37 | wife | — | Massachusetts |
| 6 | Richard O'Connor | 64 | head | Laborer | Irish Free State |
| 7 | Mary O'Connor | 63 | wife | — | Irish Free State |
| 8 | Mary O'Connor | 31 | daughter | Secretary | Massachusetts |
| 9 | Eugene Mccarthy | 62 | boarder | Laborer | Irish Free State |
| 10 | John Griffin | 55 | head | Steam Fitter | Irish Free State |
| 11 | Hannah Griffin | 53 | wife | — | Irish Free State |
| 12 | John Griffin THIS PERSON | 20 | son | — | Massachusetts |
| 13 | Margaret Griffin | 13 | daughter | — | Massachusetts |
| 14 | Robert Wright | 60 | head | Motorman | Massachusetts |
| 15 | Ellen Wright | 66 | wife | — | Massachusetts |
| 16 | Helen Wright | 32 | daughter | Teacher | Massachusetts |
| 17 | William Wright | 30 | son | Welder | Massachusetts |
| 18 | Elizabeth Wright | 29 | daughter | Graduate Nurse | Massachusetts |
| 19 | Robert Chamberlain | 1 | lodger | — | Connecticut |
| 20 | Robert Balser | 48 | head | Production Manager | Scotland |
| 21 | Mary Balser | 47 | wife | — | Scotland |
| 22 | Doris Balser | 20 | daughter | — | Massachusetts |
| 23 | Robert Balser | 18 | son | — | Massachusetts |
| 24 | Harry Sweet | 45 | head | Draftsman | Massachusetts |
| 25 | Teresa Sweet | 45 | wife | — | Massachusetts |
| 26 | Edward Sweet | 12 | son | — | Massachusetts |
| 27 | William Sweet | 10 | son | — | Massachusetts |
| 28 | Richard Sweet | 8 | son | — | Massachusetts |
| 29 | Teresa Sweet | 7 | daughter | — | Massachusetts |
| 30 | Harry Sweet | 3 | son | — | Massachusetts |
| 31 | Thomas Moore | 39 | head | Foreman | Massachusetts |
| 32 | Edith Moore | 37 | wife | — | Massachusetts |
| 33 | Robert Moore | 14 | son | — | Massachusetts |
| 34 | Catherine Moore | 12 | daughter | — | Massachusetts |
| 35 | Mary Moore | 11 | daughter | — | Massachusetts |
| 36 | Thomas Moore | 8 | son | — | Massachusetts |
| 37 | Marjorie Moore | 3 | daughter | — | Massachusetts |
| 38 | Michael Holden | 73 | head | Spinner | Massachusetts |
| 39 | Mary Holden | 72 | wife | — | Massachusetts |
| 40 | William Murphy | 35 | son in law | Clerk | 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)