JN
John Nichols — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Nichols across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 4-person household.
Age 55
b. ~1885
Male
Head
Born: Greece
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Nichols |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Greece |
| 1935 Residence (City) | CHICAGO CITY |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Proprietor |
| Industry | Retail Delicatessen |
| Class of Worker | OA |
| Hours Worked | 91 |
| Income (1939) | 156 |
| Highest Grade | No 8 |
| 1935 Residence | Illinois |
| Birth Country | Greece |
| Birthplace (normalized) | greece |
| Occupation | Proprietor |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1885 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Catherine Nichols | Daughter | — | 7 | ~1933 |
| John Nichols | Head | — | 55 | ~1885 |
| Christ Nichols | Son | — | 5 | ~1935 |
| Cecelia Nichols | Spouse | — | 35 | ~1905 |
Census Appearances
1920
Cook, Illinois
Other, age 34
Cook, Illinois · implied b. ~1886 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | John |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Greece |
| Year of Immigration | 1900 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Greece |
| Mother's Birthplace | Greece |
| Occupation | Merchant |
| Industry | Fruit |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Greek |
| Birth Country | Greece |
| Year of Naturalization | 1900 |
| Birthplace (normalized) | greece |
1930
Cook, Illinois
Other, age 45
Cook, Illinois · implied b. ~1885 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | John |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Single |
| Birthplace | Greece |
| Naturalization Status | Naturalized |
| Year of Immigration | 1904 |
| Age at First Marriage | 27 |
| Father's Birthplace | Greece |
| Mother's Birthplace | Greece |
| Occupation | Manager |
| Industry | Billiard Parlor |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Greek |
| Home Owned/Rented | No |
| Veteran | Yes |
| Birth Country | Greece |
| Birthplace (normalized) | greece |
1940
Cook-County, Illinois
Head, age 55
Cook-County, Illinois · implied b. ~1885 — 4 household members
| Surname | Nichols |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Greece |
| 1935 Residence (City) | CHICAGO CITY |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Proprietor |
| Industry | Retail Delicatessen |
| Class of Worker | OA |
| Hours Worked | 91 |
| Income (1939) | 156 |
| Highest Grade | No 8 |
| 1935 Residence | Illinois |
| Birth Country | Greece |
| Birthplace (normalized) | greece |
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 Nichols across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Nichols
Head · 1940 · age 55 · b. ~1885 · 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-t0627-00933-00616)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Abbie Ramsey | 84 | Head | — | Pennsylvania |
| 2 | John Felty | 50 | Head | Proprietor | Pennsylvania |
| 3 | Mayme Felty | 46 | Wife | Office Worker | Illinois |
| 4 | William Faulkner | 36 | Head | Maintenance | Illinois |
| 5 | Ann Faulkner | 33 | Wife | — | Illinois |
| 6 | Elizabeth Faulkner | 7 | Daughter | — | Illinois |
| 7 | Mary Faulkner | 5 | Daughter | — | Illinois |
| 8 | John Connors | 50 | Head | Laborer | Illinois |
| 9 | Frank Connors | 20 | Son | Messenger | Illinois |
| 10 | William Connors | 17 | Son | Messenger Boy | Illinois |
| 11 | Margaret Connors | 15 | Daughter | — | Illinois |
| 12 | Joan Connors | 4 | Daughter | — | Illinois |
| 13 | Margaret Connors | 50 | Wife | — | Illinois |
| 14 | Fred C. Thomas | 62 | Head | Crossing Watchman | England |
| 15 | Belle Tysiak | 55 | Daughter | Senior Clerk | Wisconsin |
| 16 | Samuel Gaster | 33 | Lodger | Chef-Cook | Pennsylvania |
| 17 | Margaret Gaster | 29 | Lodger | — | Illinois |
| 18 | John J. Becker | 25 | Lodger | Electrolysis Tester | Illinois |
| 19 | Homer Unger | 33 | Head | Railroad Car Inspector | Illinois |
| 20 | Lucille Unger | 32 | Wife | — | Illinois |
| 21 | Desmond Whelan | 35 | Head | Bartender | Irish Free State |
| 22 | Adele Whelan | 37 | Wife | — | Scotland |
| 23 | Patricia Whelan | 10 | Daughter | — | Illinois |
| 24 | Desmond Jr. Whelan | 6 | Son | — | Illinois |
| 25 | James Whelan | 2 | Son | — | Illinois |
| 26 | Mary O'Brien | 36 | Head | Sales Woman | Illinois |
| 27 | Loretta O'Brien | 16 | Daughter | — | Illinois |
| 28 | John O'Brien | 14 | Son | — | Illinois |
| 29 | Edward O'Brien | 13 | Son | — | Illinois |
| 30 | Mary O'Brien | 4 | Daughter | — | Illinois |
| 31 | Michael Troy | 33 | Head | Printer | Illinois |
| 32 | Helen Troy | 34 | Wife | Key Punch Operator | Illinois |
| 33 | Patricia Troy | 4 | Daughter | — | Illinois |
| 34 | John Nichols THIS PERSON | 55 | Head | Proprietor | Greece |
| 35 | Cecelia Nichols | 35 | Wife | Clerk | Illinois |
| 36 | Catherine Nichols | 7 | Daughter | — | Illinois |
| 37 | Christ Nichols | 5 | Son | — | Illinois |
| 38 | Joseph Pecora | 42 | Head | Proprietor | Italy |
| 39 | Marie Pecora | 44 | Wife | — | Italy |
| 40 | Charlotte Pecora | 12 | Daughter | — | 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)