JF
John Finn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Finn across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 8-person household.
Age 23
b. ~1917
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Finn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Retail Grocery Clerk |
| Industry | Chain Store |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 900 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Retail Grocery Clerk |
| Township / Ward | Boston City |
| Est. Birth Year | ~1917 |
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 |
|---|---|---|---|---|
| Mary Finn | Daughter | — | 19 | ~1921 |
| Anne Finn | Daughter | — | 28 | ~1912 |
| Thomas Finn | Son | — | 26 | ~1914 |
| Mary Finn | Spouse | — | 57 | ~1883 |
| John Finn | Head | — | 58 | ~1882 |
| Robert Finn | Son | — | 16 | ~1924 |
| James Finn | Son | — | 21 | ~1919 |
| John Finn | Son | — | 23 | ~1917 |
Census Appearances
1930
Suffolk, Massachusetts
Son, age 14
Suffolk, Massachusetts · implied b. ~1916 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Finn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland Free State |
| Mother's Birthplace | Ireland Free State |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 23
Suffolk-County, Massachusetts · implied b. ~1917 — 8 household members
| Surname | Finn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Occupation | Retail Grocery Clerk |
| Industry | Chain Store |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 900 |
| 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 Finn across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Finn
Son · 1940 · age 23 · b. ~1917 · Massachusetts
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Sibling
Robert Finn
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Finn
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Finn
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Finn
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Finn
Sibling · 1940 · age 28
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-t0627-01678-00352)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Boniface Rico | 19 | Son | New Worker | Massachusetts |
| 42 | Anna Rico | 17 | Daughter | Nursemaid | Massachusetts |
| 43 | Concetta Rico | 16 | Daughter | Culinary Worker | Massachusetts |
| 44 | John Rico | 15 | Son | — | Massachusetts |
| 45 | Eleanor Rico | 13 | Daughter | — | Massachusetts |
| 46 | Mary Rico | 11 | Daughter | — | Massachusetts |
| 47 | Ida Rico | 9 | Daughter | — | Massachusetts |
| 48 | Thomas Rico | 8 | Son | — | Massachusetts |
| 49 | John Finn | 58 | Head | Custodian | Eire |
| 50 | Mary Finn | 57 | Wife | — | Eire |
| 51 | Anne Finn | 28 | Daughter | Clerical Supervisor | Massachusetts |
| 52 | Thomas Finn | 26 | Son | Gardener | Massachusetts |
| 53 | John Finn THIS PERSON | 23 | Son | Retail Grocery Clerk | Massachusetts |
| 54 | James Finn | 21 | Son | Gardener | Massachusetts |
| 55 | Mary Finn | 19 | Daughter | New Worker | Massachusetts |
| 56 | Robert Finn | 16 | Son | — | Massachusetts |
| 57 | Maurice Denny | 46 | Head | — | Massachusetts |
| 58 | Agnes Denny | 35 | Wife | — | Massachusetts |
| 59 | Maurice Jr Denny | 12 | Son | — | Massachusetts |
| 60 | Jean Denny | 11 | Daughter | — | Massachusetts |
| 61 | Joseph Denny | 9 | Son | — | Massachusetts |
| 62 | David Denny | 7 | Son | — | Massachusetts |
| 63 | John Denny | 6 | Son | — | Massachusetts |
| 64 | Mary Denny | 3 | Daughter | — | Massachusetts |
| 65 | Helen Denny | 1 | Daughter | — | Massachusetts |
| 66 | Louis Gregory | 58 | Head | Laborer | Italy |
| 67 | Lucy Gregory | 52 | Wife | — | Italy |
| 68 | Flora Gregory | 28 | Daughter | Machine Stitcher | Massachusetts |
| 69 | Viola Gregory | 26 | Daughter | — | Massachusetts |
| 70 | Arthur Gregory | 20 | Son | Apprentice | Massachusetts |
| 71 | Anthony Gregory | 18 | Son | New Worker | Massachusetts |
| 72 | Mario Gregory | 18 | Son | New Worker | Massachusetts |
| 73 | Josephine Gregory | 17 | Daughter | — | Massachusetts |
| 74 | Minnie Fournier | 55 | Head | — | New Hampshire |
| 75 | George Stokes | 36 | Head | Service Man | Nova Scotia |
| 76 | Gladys Stokes | 30 | Wife | — | England |
| 77 | Ivan Stokes | 3 | Son | — | Massachusetts |
| 78 | Joan Stokes | 2 | Daughter | — | Massachusetts |
| 79 | Dante Gentile | 47 | Head | Gardener | Italy |
| 80 | Veglia Gentile | 37 | Wife | — | Italy |
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)