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 head (b.~1896), then head of a 10-person household.
Age 44
b. ~1896
Male
Head
Born: Canada English
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Finn |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Canada English |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Boilermaker |
| Industry | Oil |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | C 3 |
| 1935 Residence | Same house |
| Birth Country | Canada |
| Birthplace (normalized) | canada english |
| Occupation | Boilermaker |
| Township / Ward | Boston |
| Est. Birth Year | ~1896 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Finn | Daughter | — | 8 | ~1932 |
| Mary Finn | Daughter | — | 20 | ~1920 |
| John Finn | Head | — | 44 | ~1896 |
| Helen Finn | Daughter | — | 18 | ~1922 |
| Leonard Finn | Son | — | 5 | ~1935 |
| William Cahill | Other | — | 73 | ~1867 |
| Robert Finn | Son | — | 15 | ~1925 |
| Margaret Finn | Spouse | — | 43 | ~1897 |
| William Finn | Son | — | 21 | ~1919 |
| Richard Finn | Son | — | 12 | ~1928 |
Census Appearances
1930
Middlesex, Massachusetts
Head, age 34
Middlesex, Massachusetts · implied b. ~1896 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Finn |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Canada English |
| Naturalization Status | First papers filed |
| Year of Immigration | 1923 |
| Age at First Marriage | 26 |
| Father's Birthplace | Canada English |
| Mother's Birthplace | Canada English |
| Occupation | Longshoreman |
| Industry | Freight |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 26 |
| Radio Set | R |
| Birth Country | Canada |
| Birthplace (normalized) | canada english |
1940
Suffolk-County, Massachusetts
Head, age 44
Suffolk-County, Massachusetts · implied b. ~1896 — 10 household members
| Surname | Finn |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Canada English |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Occupation | Boilermaker |
| Industry | Oil |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | C 3 |
| 1935 Residence | Same house |
| Birth Country | Canada |
| Birthplace (normalized) | canada english |
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
Head · 1940 · age 44 · b. ~1896 · Massachusetts
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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-t0627-01667-00830)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marion Gates | 23 | Wife | — | Massachusetts |
| 42 | Willard Prejean | 31 | Head | Shipper | Canada French |
| 43 | Theresa Prejean | 25 | Wife | — | Massachusetts |
| 44 | Willard, Jr. Prejean | 4 | Son | — | Massachusetts |
| 45 | Albert Prejean | 3 | Son | — | Massachusetts |
| 46 | Wilbert Husbands | 42 | Head | Dormitory Attendant | Barbados |
| 47 | Bettie Husbands | 42 | Wife | — | St. Lucia, BWI |
| 48 | Yvonne Husbands | 14 | Daughter | — | Massachusetts |
| 49 | Iris Husbands | 12 | Daughter | — | Massachusetts |
| 50 | Irma Husbands | 9 | Daughter | — | Massachusetts |
| 51 | Benjamin H. Washington | 38 | Head | Porter | Massachusetts |
| 52 | Ruby Washington | 27 | Wife | — | Connecticut |
| 53 | James Lynch | 36 | Head | Truck Driver | Massachusetts |
| 54 | Mary R. Sullivan | 37 | Head | Teacher | Massachusetts |
| 55 | Julia T. Sullivan | 34 | Sister | Stenographer | Massachusetts |
| 56 | Josephine Sullivan | 30 | Sister | Teacher | Massachusetts |
| 57 | Patrick Mcternan | 71 | Head | — | Massachusetts |
| 58 | Johanna Mcternan | 71 | Wife | — | Massachusetts |
| 59 | Catherine Mcternan | 47 | Daughter | — | Massachusetts |
| 60 | Peter Mento | 11 | Boarder | — | Massachusetts |
| 61 | Jean Mento | 9 | Granddaughter | — | Massachusetts |
| 62 | Anna G. Hill | 72 | Head | — | Northern Ireland |
| 63 | Leon Lomax | 37 | Head | Contractor | South Carolina |
| 64 | Eva Lomax | 36 | Wife | — | California |
| 65 | Nephew Smythe | 18 | Nephew | Electrician'S Helper | Georgia |
| 66 | Barbara Smythe | 11 | Daughter | — | Massachusetts |
| 67 | Patricia Smythe | 5 | Daughter | — | California |
| 68 | Loretta Smythe | 2 | Daughter | — | Massachusetts |
| 69 | John Finn THIS PERSON | 44 | Head | Boilermaker | Canada English |
| 70 | Margaret Finn | 43 | Wife | — | Massachusetts |
| 71 | William Cahill | 73 | Father-in-law | — | Massachusetts |
| 72 | William Finn | 21 | Son | New Worker | Massachusetts |
| 73 | Mary Finn | 20 | Daughter | — | Massachusetts |
| 74 | Helen Finn | 18 | Daughter | — | Massachusetts |
| 75 | Robert Finn | 15 | Son | — | Massachusetts |
| 76 | Richard Finn | 12 | Son | — | Massachusetts |
| 77 | Margaret Finn | 8 | Daughter | — | Massachusetts |
| 78 | Leonard Finn | 5 | Son | — | Massachusetts |
| 79 | Thomas F. Gill | 57 | Head | — | Massachusetts |
| 80 | William Vann | 44 | Head | Sign Painter | New York |
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)