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Mary Bentley — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Bentley across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Bert & Mary — first a head (b.~1906), then head of a 6-person household.
Age 34
b. ~1906
Female
Head
Born: Illinois
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Bentley |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1906 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Bentley | Head | — | 34 | ~1906 |
| Robert Bentley | Son | — | 3 | ~1937 |
| Elaine Bentley | Daughter | — | 10 | ~1930 |
| Lawrence Bentley | Son | — | 12 | ~1928 |
| Marshall Bentley | Son | — | 13 | ~1927 |
| Dorothy Bentley | Daughter | — | 15 | ~1925 |
Census Appearances
1920
Cook, Illinois
Daughter, age 14
Cook, Illinois · implied b. ~1906 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bentley |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 23
Cook, Illinois · implied b. ~1907 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bentley |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 34
Cook-County, Illinois · implied b. ~1906 — 6 household members
| Surname | Bentley |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 34 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| 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 Bentley across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Bert Bentley (~0.92 confidence) and mother Mary Bentley (~0.92 confidence) and mother Sara Bentley (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Bert Bentley
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Mary Bentley
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Sara Bentley
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Bentley
Head · 1940 · age 34 · b. ~1906 · Illinois
★ You are viewing this record
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-t0627-00986-00621)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Avery Wilson | 75 | Head | — | Mississippi |
| 42 | Lilly Wilson | 54 | Wife | — | Georgia |
| 43 | Hugo Gautier | 57 | Head | Watchman | Illinois |
| 44 | Minnie Gautier | 55 | Wife | — | Illinois |
| 45 | Elizabeth Gautier | 16 | Daughter | — | Illinois |
| 46 | Joseph Gautier | 12 | Son | — | Illinois |
| 47 | Nick Donner | 51 | Head | Laborer | Greece |
| 48 | Mary Donner | 42 | Wife | — | Greece |
| 49 | Peter Donner | 18 | Son | — | Illinois |
| 50 | August Donner | 17 | Son | — | Illinois |
| 51 | Alice Donner | 13 | Daughter | — | Illinois |
| 52 | Georgia Donner | 9 | Daughter | — | Illinois |
| 53 | Earl Baker | 41 | Head | Chef | Illinois |
| 54 | Agnes Baker | 38 | Wife | Ironer Washer | Illinois |
| 55 | Dorothy Wright | 16 | Stepdaughter | New Worker | Illinois |
| 56 | Mary Bentley THIS PERSON | 34 | Head | — | Illinois |
| 57 | Dorothy Bentley | 15 | Daughter | — | Illinois |
| 58 | Marshall Bentley | 13 | Son | — | Illinois |
| 59 | Lawrence Bentley | 12 | Son | — | Illinois |
| 60 | Elaine Bentley | 10 | Daughter | — | Illinois |
| 61 | Robert Bentley | 3 | Son | — | Illinois |
| 62 | John Rogowski | 47 | Head | Inspector | Poland |
| 63 | Cornelia Rogowski | 46 | Wife | — | Poland |
| 64 | Frances Rogowski | 20 | Daughter | Power Machine Op | Illinois |
| 65 | John Rogowski | 18 | Son | Helper (Wholesale) | Illinois |
| 66 | Florence Rogowski | 16 | Daughter | — | Illinois |
| 67 | Ernest Conrad | 66 | Head | — | Germany |
| 68 | Anna Conrad | 50 | Wife | — | Illinois |
| 69 | Margaret Conrad | 26 | Daughter | Coil Winder | Illinois |
| 70 | Robert Conrad | 21 | Son | Electrical Worker | Illinois |
| 71 | Marie Conrad | 11 | Daughter | — | Illinois |
| 72 | Ernest Jr. Conrad | 27 | Son | Automobile Mechanic | Illinois |
| 73 | Sophie Conrad | 27 | Daughter-in-law | Housewife Home | Illinois |
| 74 | Otilia Adler | 66 | Mother-in-law | — | Czechoslovakia |
| 75 | Frank Donner | 47 | Head | Hammer | Austria |
| 76 | Elizabeth Donner | 47 | Wife | — | Austria |
| 77 | Frank Donner | 21 | Son | Head Waiter | Illinois |
| 78 | Edward Donner | 17 | Son | — | Illinois |
| 79 | Clarence Donner | 8 | Son | — | Illinois |
Related Census Records
Pedigree Summary
Mary
Gen 1 · 3 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)