JG
John Griffin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Griffin across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1925), then head of a 13-person household.
Age 15
b. ~1925
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1925 |
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.
13 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Arlene Griffin | Daughter | — | 9 | ~1931 |
| Elizabeth Griffin | Daughter | — | 11 | ~1929 |
| Lorraine Griffin | Daughter | — | 10 | ~1930 |
| Catherine Griffin | Daughter | — | 16 | ~1924 |
| Ann Griffin | Daughter | — | 23 | ~1917 |
| Thomas Griffin | Head | — | 47 | ~1893 |
| Edward Griffin | Son | — | 17 | ~1923 |
| Thomas Griffin | Son | — | 21 | ~1919 |
| John Griffin | Son | — | 15 | ~1925 |
| Donald Griffin | Son | — | 3 | ~1937 |
| Warren Griffin | Son | — | 5 | ~1935 |
| James Griffin | Son | — | 20 | ~1920 |
| Elizabeth Griffin | Spouse | — | 45 | ~1895 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 5
Middlesex, Massachusetts · implied b. ~1925 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | New Hampshire |
| Mother's Birthplace | New Hampshire |
| Can Read/Write | No |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 15
Middlesex-County, Massachusetts · implied b. ~1925 — 13 household members
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Lowell city |
| 1935 Residence (County) | Middlesex |
| Highest Grade | No 8 |
| 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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Griffin
Son · 1940 · age 15 · b. ~1925 · Massachusetts
★ You are viewing this record
Sibling
Arlene Griffin
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Griffin
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Warren Griffin
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Griffin
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Griffin
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Griffin
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Griffin
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Griffin
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorraine Griffin
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Griffin
Sibling · 1940 · age 17
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01691-00068)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Douglas Oliveria | 21 | Boarder | Spinner | Massachusetts |
| 2 | John J. Pyne | 40 | Head | Garnier | Poland |
| 3 | Sophia Pyne | 45 | Wife | Card Room | Poland |
| 4 | Bernice Pyne | 22 | Daughter | Laborer | Massachusetts |
| 5 | Tadeusz Pyne | 14 | Son | — | Massachusetts |
| 6 | Josephine Pyne | 13 | Daughter | — | Massachusetts |
| 7 | Catherine Cullen | 63 | Head | — | Northern Ireland |
| 8 | Thomas Cullen | 40 | Son | Laborer | Massachusetts |
| 9 | Thomas Griffin | 47 | Head | Fireman | New Hampshire |
| 10 | Elizabeth Griffin | 45 | Wife | — | New Hampshire |
| 11 | Ann Griffin | 23 | Daughter | Inspector | Massachusetts |
| 12 | Thomas Jr. Griffin | 21 | Son | Clerk | Massachusetts |
| 13 | James Griffin | 20 | Son | Laborer | Massachusetts |
| 14 | Edward Griffin | 17 | Son | — | Massachusetts |
| 15 | Catherine Griffin | 16 | Daughter | — | Massachusetts |
| 16 | John Griffin THIS PERSON | 15 | Son | — | Massachusetts |
| 17 | Elizabeth Griffin | 11 | Daughter | — | Massachusetts |
| 18 | Lorraine Griffin | 10 | Daughter | — | Massachusetts |
| 19 | Arlene Griffin | 9 | Daughter | — | Massachusetts |
| 20 | Warren Griffin | 5 | Son | — | Massachusetts |
| 21 | Donald Griffin | 3 | Son | — | Massachusetts |
| 22 | Walter Fullon | 33 | Head | Machinist'S Helper | Massachusetts |
| 23 | Elizabeth Fullon | 25 | Wife | — | Maine |
| 24 | Hazel Fullon | 5 | Son | — | Maine |
| 25 | Jennie Fullon | 0 | Daughter | — | Massachusetts |
| 26 | Patrick Connellan | 48 | Head | Laborer | Northern Ireland |
| 27 | Mary Connellan | 47 | Wife | — | Northern Ireland |
| 28 | Elizabeth Connellan | 21 | Daughter | Seamstress | Massachusetts |
| 29 | John Connellan | 19 | Son | Laborer | Massachusetts |
| 30 | Charles Gillespie | 64 | Head | Laborer | New Hampshire |
| 31 | Alfred B. Sager | 52 | Head | Janitor | England |
| 32 | Anna Sager | 50 | Wife | Spinner | Massachusetts |
| 33 | Alfred Jr. Sager | 19 | Son | Helper | Massachusetts |
| 34 | Ethel Sager | 17 | Daughter | — | Massachusetts |
| 35 | Norman Sager | 15 | Son | — | Massachusetts |
| 36 | John Sager | 12 | Son | — | Massachusetts |
| 37 | Alice Sager | 8 | Daughter | — | Massachusetts |
| 38 | Catherine Connell | 57 | Head | Clinic Aid | Northern Ireland |
| 39 | Martin Connell | 43 | Partner | Foreman | Northern Ireland |
| 40 | Samuel Pollard | 67 | Head | Laborer | Northern Ireland |
Related Census Records
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)