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Mary Best — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Best across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents James & Joe — first a daughter (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Best |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Berwyn City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Bench work |
| Industry | Radio Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 416 |
| Highest Grade | No 12 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Bench Work |
| Township / Ward | Berwyn City |
| Est. Birth Year | ~1915 |
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 |
|---|---|---|---|---|
| Edith Best | Daughter | — | 22 | ~1918 |
| Emil Best | Son | — | 28 | ~1912 |
| Mary Best | Daughter | — | 25 | ~1915 |
| Louis Best | Son | — | 27 | ~1913 |
| Jenny Best | Spouse | — | 52 | ~1888 |
| James Best | Head | — | 62 | ~1878 |
Census Appearances
1920
Cook, Illinois
Daughter, age 4
Cook, Illinois · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Basta |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 14
Cook, Illinois · implied b. ~1916 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Basta |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Age at First Marriage | 0 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 25
Cook-County, Illinois · implied b. ~1915 — 6 household members
| Surname | Best |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Berwyn City |
| 1935 Residence (County) | Cook |
| Occupation | Bench work |
| Industry | Radio Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 416 |
| Highest Grade | No 12 |
| 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 Best across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Best (~0.92 confidence) and father Joe Bartzik (~0.92 confidence) and father John Basta (~0.92 confidence) and mother Jenny Best (~0.92 confidence) and mother Mary Basta (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Best
b. ~1878
Source father
● Household
· direct · ~0.92
Father
Joe Bartzik
b. ~1880
Source father
● Household
· direct · ~0.92
Father
John Basta
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Jenny Best
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Mary Basta
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Best
Daughter · 1940 · age 25 · b. ~1915 · Illinois
★ You are viewing this record
Sibling
Emil Best
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edith Best
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louis Best
Sibling · 1940 · age 27
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 — 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-t0627-00772-00742)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dorothy Vlisk | 16 | daughter | — | Illinois |
| 42 | Mildred Vlisk | 12 | daughter | — | Illinois |
| 43 | Joseph Veruby | 44 | Head | Packer | Illinois |
| 44 | Marie Veruby | 38 | Wife | — | Illinois |
| 45 | Adeline Veruby | 19 | daughter | Waitress | Illinois |
| 46 | George Veruby | 17 | son | New Worker | Illinois |
| 47 | Dorothy Veruby | 13 | daughter | — | Illinois |
| 48 | Richard Veruby | 9 | son | — | Illinois |
| 49 | Joseph Veruby | 4 | son | — | Illinois |
| 50 | Frank Eisenbraun | 33 | Head | Repairman | Illinois |
| 51 | Frances Eisenbraun | 32 | wife | Comptometer Operator | Illinois |
| 52 | Herbert Ahntholz | 30 | Head | Radio Engineer | Iowa |
| 53 | Mary Ahntholz | 26 | wife | — | Illinois |
| 54 | Edna Nothareau | 32 | Head | Statistical Clerk | Illinois |
| 55 | Joan Nothareau | 31 | wife | — | Illinois |
| 56 | Dale Nothareau | 6 | son | — | Illinois |
| 57 | Raymond Nothareau | 1 | daughter | — | Illinois |
| 58 | Albin Eyta | 38 | Head | Salesman | Illinois |
| 59 | Jennie Eyta | 33 | wife | — | Illinois |
| 60 | Joyce Eyta | 9 | daughter | — | Illinois |
| 61 | Frank Najt | 42 | Head | Truck Driver | Czechoslovakia |
| 62 | Lillian Najt | 38 | wife | — | Czechoslovakia |
| 63 | Lillian Najt | 19 | daughter | — | Illinois |
| 64 | Raymond Najt | 13 | son | — | Illinois |
| 65 | Frank Barak | 46 | Head | Painter | Czechoslovakia |
| 66 | Anna Barak | 45 | Wife | — | Illinois |
| 67 | Ray Barak | 21 | son | Printer | Illinois |
| 68 | George Liska | 26 | son in law | Printer | Illinois |
| 69 | Adeline Liska | 24 | daughter | Office Clerk | Illinois |
| 70 | John F. Malina | 35 | Lodger | Laborer | Illinois |
| 71 | Emil F. Malina | 3 | son | — | Illinois |
| 72 | Theresa Komegh | 50 | Head | — | Illinois |
| 73 | Joseph Novasner | 32 | Head | Laborer | Illinois |
| 74 | Violet R. Novasner | 26 | wife | Office Clerk | Illinois |
| 75 | James Best | 62 | Head | Repairman Watches | Czechoslovakia |
| 76 | Jenny Best | 52 | wife | — | Czechoslovakia |
| 77 | Emil Best | 28 | son | Salesman | Illinois |
| 78 | Louis Best | 27 | son | Advertising Assembler | Czechoslovakia |
| 79 | Edith Best | 22 | daughter | Bench Work | Illinois |
| 80 | Mary Best THIS PERSON | 25 | daughter | Bench Work | Illinois |
Pedigree Summary
Mary + 3 siblings
Gen 1 · 5 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)