JG
James Griffin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this James Griffin across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents John & Mary — first a son (b.~1920), then head of a 5-person household.
Age 20
b. ~1920
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Griffin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Odd Jobs |
| Industry | Lately none |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 128 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Odd Jobs |
| Township / Ward | Boston |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Griffin | Daughter | — | 26 | ~1914 |
| John Griffin | Head | — | 60 | ~1880 |
| Thomas Griffin | Son | — | 22 | ~1918 |
| James Griffin | Son | — | 20 | ~1920 |
| Mary Griffin | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age
Suffolk, Massachusetts · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | James |
| 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
Suffolk, Massachusetts
Son, age 10
Suffolk, Massachusetts · implied b. ~1920 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| 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 — 5 household members
| Surname | Griffin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Odd Jobs |
| Industry | Lately none |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 128 |
| 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 James 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 Mary Griffin (~0.92 confidence) and father Anthony Griffin (~0.92 confidence) and mother Barbara Griffin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Griffin
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Mary Griffin
b. ~1880
Source mother
● Household
· direct · ~0.92
Father
Anthony Griffin
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Barbara Griffin
b. ~1901
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Griffin
Son · 1940 · age 20 · b. ~1920 · Massachusetts
★ You are viewing this record
Sibling
Elizabeth Griffin
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Griffin
Sibling · 1940 · age 22
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-t0627-01668-00251)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Roderick Holmes | 48 | Head | Salesman | Canada English |
| 42 | Mildred Holmes | 37 | Wife | — | New Hampshire |
| 43 | Barbara Holmes | 8 | Daughter | — | Massachusetts |
| 44 | Catherine Holmes | 5 | Daughter | — | Massachusetts |
| 45 | William Chisholm | 58 | Head | Motorman | Canada English |
| 46 | Anna Chisholm | 57 | Wife | — | Canada English |
| 47 | Raymond Chisholm | 26 | Son | Truck Driver | Massachusetts |
| 48 | Leonard Chisholm | 25 | Son | Elevator Operat. | Massachusetts |
| 49 | Francis Chisholm | 23 | Son | Shipping Clerk | Massachusetts |
| 50 | William Chisholm | 20 | Son | New Worker | Massachusetts |
| 51 | Hugh Chisholm | 18 | Son | New Worker | Massachusetts |
| 52 | Francis Scott | 47 | Head | Fireman | Massachusetts |
| 53 | Agnes Scott | 49 | Wife | — | England |
| 54 | Edmund Scott | 23 | Son | Typist | Massachusetts |
| 55 | Lorraine Scott | 18 | Daughter | — | Massachusetts |
| 56 | Marie Scott | 15 | Daughter | — | Massachusetts |
| 57 | Elaine Scott | 12 | Daughter | — | Massachusetts |
| 58 | John F. Dowd | 36 | Head | Waiter | Massachusetts |
| 59 | Charlotte Dowd | 29 | Wife | Salesgirl | Massachusetts |
| 60 | Constance Dowd | 1 | Daughter | — | Massachusetts |
| 61 | Sophie Sowierski | 66 | Mother-in-law | — | Poland |
| 62 | Michael Kilroy | 68 | Head | — | New York |
| 63 | Mary Kilroy | 64 | Wife | — | Massachusetts |
| 64 | John Kilroy | 35 | Son | Laborer | Massachusetts |
| 65 | Elizabeth Kilroy | 33 | Daughter | Salesgirl | Massachusetts |
| 66 | Margaret Kelley | 66 | Sister-in-law | — | New York |
| 67 | Mary Macleod | 77 | Head | — | Canada English |
| 68 | Duncan Macleod | 42 | Son | Proprietor | Canada English |
| 69 | John Griffin | 60 | Head | Chauffeur | Massachusetts |
| 70 | Mary Griffin | 60 | Wife | — | Massachusetts |
| 71 | Elizabeth Griffin | 26 | Daughter | Matron | Massachusetts |
| 72 | Thomas Griffin | 22 | Son | Stock Boy | Massachusetts |
| 73 | James Griffin THIS PERSON | 20 | Son | Odd Jobs | Massachusetts |
| 74 | Frank Mcnamee | 41 | Head | Prison Officer | Massachusetts |
| 75 | Josephine Mcnamee | 32 | Wife | — | Massachusetts |
| 76 | Francis Mcnamee | 11 | Son | — | Massachusetts |
| 77 | Joseph Mcnamee | 10 | Son | — | Massachusetts |
| 78 | Robert Mcnamee | 7 | Son | — | Massachusetts |
| 79 | Elizabeth Mcnamee | 6 | Daughter | — | Massachusetts |
| 80 | Edward Whalen | 63 | Head | Fireman | Massachusetts |
Pedigree Summary
James + 2 siblings
Gen 1 · 4 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)