JF
John Finn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Finn across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1891), then head of a 7-person household.
Age 49
b. ~1891
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Finn |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Scavenger |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 420 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Truck Driver |
| Township / Ward | Chicago |
| Est. Birth Year | ~1891 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Patricia Finn | Daughter | — | 7 | ~1933 |
| Martin Finn | Son | — | 23 | ~1917 |
| John Finn | Son | — | 25 | ~1915 |
| Edward Finn | Son | — | 10 | ~1930 |
| John Finn | Head | — | 49 | ~1891 |
| William Finn | Son | — | 22 | ~1918 |
| Cornelia Finn | Spouse | — | 45 | ~1895 |
Census Appearances
1930
Cook, Illinois
Other, age 39
Cook, Illinois · implied b. ~1891 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Finn |
| Given Name | John F. |
| Relationship to Head | Roomer |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Traffic Mgr |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 49
Cook-County, Illinois · implied b. ~1891 — 7 household members
| Surname | Finn |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Truck Driver |
| Industry | Scavenger |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 420 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 49 · b. ~1891 · Illinois
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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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00955-00637)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Savage | 30 | Head | Owner | Illinois |
| 2 | Florence Savage | 28 | Wife | — | Illinois |
| 3 | Gerald Savage | 4 | Son | — | Illinois |
| 4 | John Jr. Savage | 1 | Son | — | Illinois |
| 5 | Clifton Noe | 49 | Head | Salesman | Kentucky |
| 6 | Lettie Noe | 47 | Wife | Bookkeeper | Illinois |
| 7 | Martha Cottle | 69 | Mother-in-law | — | Illinois |
| 8 | Charles Moss | 51 | Head | Mailman | Illinois |
| 9 | Vendela Moss | 38 | Wife | — | Illinois |
| 10 | Barbara Moss | 15 | Daughter | — | Illinois |
| 11 | John Moss | 10 | Son | — | Illinois |
| 12 | Ina Moss | 49 | Sister | Infant Nurse | Illinois |
| 13 | August Rodemann | 61 | Head | Laborer | Germany |
| 14 | Lydia Rodemann | 62 | Wife | — | Germany |
| 15 | Otto Rodemann | 27 | Son | Teller | Germany |
| 16 | Robert Sturzenbecher | 33 | Son-in-law | Agent | Germany |
| 17 | Mimi Sturzenbecher | 33 | Daughter | — | Germany |
| 18 | Mary R. Boland | 75 | Head | — | Ohio |
| 19 | Lura Gilmore | 52 | Head | — | Illinois |
| 20 | Barbara Gilmore | 21 | Daughter | Stenographer | Illinois |
| 21 | Laurette Gilmore | 20 | Daughter | Comptometer Opr | Illinois |
| 22 | Alice Gottwald | 57 | Head | — | England |
| 23 | Edson Gottwald | 31 | Son | Laborer | Wisconsin |
| 24 | Christian Hartman | 57 | Head | Freight-Router | Illinois |
| 25 | Victoria Hartman | 52 | Wife | — | Indiana |
| 26 | John Finn THIS PERSON | 49 | Head | Truck Driver | Illinois |
| 27 | Cornelia Finn | 45 | Wife | — | Illinois |
| 28 | John Finn | 25 | Son | Truck Driver | Illinois |
| 29 | Martin Finn | 23 | Son | Inspector | Illinois |
| 30 | William Finn | 22 | Son | Operator | Illinois |
| 31 | Edward Finn | 10 | Son | — | Illinois |
| 32 | Patricia Finn | 7 | Daughter | — | Illinois |
| 33 | Caroline Schultz | 60 | Head | — | Ohio |
| 34 | Sylvia Mae Schultz | 18 | Daughter | — | Illinois |
| 35 | Paul Peterson | 33 | Lodger | Partner-Prop | Germany |
| 36 | Katherine Peterson | 30 | Lodger | Partner-Prop | Germany |
| 37 | Walter Entz | 31 | Lodger | Nurse | Canada-English |
| 38 | Edna Entz | 31 | Lodger | Nurse | Canada-English |
| 39 | Josephine Lust | 40 | Lodger | Room Inspector | Germany |
| 40 | Frances Lust | 17 | Lodger | — | Illinois |
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)