MF
Mary Finley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Finley across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 7-person household.
Age 41
b. ~1899
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Finley |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Pet Store |
| Industry | Own Business |
| Class of Worker | OA |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Pet Store |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1899 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Irene Finley | Daughter | — | 5 | ~1935 |
| Robert Finley | Son | — | 17 | ~1923 |
| Lorraine Finley | Daughter | — | 20 | ~1920 |
| Marion Finley | Daughter | — | 21 | ~1919 |
| Mary Finley | Spouse | — | 41 | ~1899 |
| Dennis Finley | Head | — | 44 | ~1896 |
| Dennis Finley | Son | — | 14 | ~1926 |
Census Appearances
1930
Cook, Illinois
Spouse, age 31
Cook, Illinois · implied b. ~1899 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Finley |
| Given Name | Mae M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 18 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 41
Cook-County, Illinois · implied b. ~1899 — 7 household members
| Surname | Finley |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Pet Store |
| Industry | Own Business |
| Class of Worker | OA |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| 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 Mary Finley across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Finley
Spouse · 1940 · age 41 · b. ~1899 · 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
39 people indexed on this census page (nara:1940:m-t0627-00944-00584)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter Norvich | 47 | Lodger | — | Lithuania |
| 2 | Martin Pardoska | 56 | Lodger | — | Lithuania |
| 3 | Matthew Martin | 27 | Head | Labor | Illinois |
| 4 | Mary Martin | 25 | Wife | — | New York |
| 5 | Josephine Martin | 1 | Daughter | — | Illinois |
| 6 | John Detter | 52 | Head | Salesman | Ohio |
| 7 | Catherine Detter | 51 | Wife | — | Illinois |
| 8 | Beatrice O'Neil | 45 | Daughter | — | Illinois |
| 9 | Robert O'Neil | 20 | Son | New Worker | Illinois |
| 10 | Fitzgerald O'Neil | 18 | Son | — | Illinois |
| 11 | John Martin | 52 | Head | Foreman | Italy |
| 12 | Josephine Martin | 46 | Wife | — | Italy |
| 13 | Carmela Martin | 22 | Daughter | Operator | Illinois |
| 14 | Frank Martin | 20 | Son | Labor | Illinois |
| 15 | Nancy Martin | 14 | Daughter | — | Illinois |
| 16 | Leon Liausas | 44 | Head | Watchman | Lithuania |
| 17 | Dennis Finley | 44 | Head | Pet Store | Illinois |
| 18 | Mary Finley THIS PERSON | 41 | Wife | Pet Store | Illinois |
| 19 | Marion Finley | 21 | Daughter | Steno | Illinois |
| 20 | Lorraine Finley | 20 | Daughter | Sorter | Illinois |
| 21 | Robert Finley | 17 | Son | New Worker | Illinois |
| 22 | Dennis Jr. Finley | 14 | Son | — | Illinois |
| 23 | Irene Finley | 5 | Daughter | — | Illinois |
| 24 | Joseph Danshas | 62 | Head | Janitor | Lithuania |
| 25 | Eva Danshas | 61 | Wife | — | Lithuania |
| 26 | Edward Danshas | 31 | Son | Salesman | Illinois |
| 27 | Arthur Danshas | 24 | Son | Welder | Illinois |
| 28 | Theresa Sormer | 48 | Head | — | Czech-Slovakia |
| 29 | Mina Sormer | 50 | Daughter | — | Czech-Slovakia |
| 30 | Edgar Klausner | 44 | Boarder | Salesman | Austria |
| 31 | Margaret Klausner | 37 | Boarder's Wife | Housekeeper | Austria |
| 32 | George Jakubauskas | 44 | Head | Grocer | Lithuania |
| 33 | Julia Jakubauskas | 50 | Wife | Sausage Maker | Lithuania |
| 34 | Marion Jakubauskas | 31 | Daughter | File Clerk | Illinois |
| 35 | Richard Jakubauskas | 12 | Son | — | Illinois |
| 36 | Simon Martinkus | 64 | Head | — | Lithuania |
| 37 | Joseph Martinkus | 24 | Son | Coal Man | Illinois |
| 38 | Agustine Nuerzella | 58 | Head | Barber | Lithuania |
| 39 | Nuerzella | 49 | Wife | — | Lithuania |
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)