JL
John Lucas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Lucas across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1881), then head of a 5-person household.
Age 59
b. ~1881
Male
Head
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Lucas |
| Given Name | John Sr. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Carpenter |
| Industry | Building Contractor |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 1670 |
| Highest Grade | G 4 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Carpenter |
| Township / Ward | Chicago |
| Est. Birth Year | ~1881 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Lucas | Head | — | 59 | ~1881 |
| Paul Stoner | Other | — | 36 | ~1904 |
| Albert Haack | Other | — | 58 | ~1882 |
| John Lucas | Son | — | 27 | ~1913 |
| Lena Lucas | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Cook, Illinois
Head, age 38
Cook, Illinois · implied b. ~1882 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lucas |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1884 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Carpenter |
| Industry | Rail Road |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Home Owned/Rented | R |
| Birth Country | Scotland |
| Year of Naturalization | 1900 |
| Birthplace (normalized) | scotland |
1930
Cook, Illinois
Head, age 49
Cook, Illinois · implied b. ~1881 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lucas |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1889 |
| Age at First Marriage | 24 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Carpenter |
| Industry | Building |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 33 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Cook-County, Illinois
Head, age 59
Cook-County, Illinois · implied b. ~1881 — 5 household members
| Surname | Lucas |
| Given Name | John Sr. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Carpenter |
| Industry | Building Contractor |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 1670 |
| Highest Grade | G 4 |
| 1935 Residence | Same place |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Lucas 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 Lucas
Head · 1940 · age 59 · b. ~1881 · 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
40 people indexed on this census page (nara:1940:m-t0627-00945-00452)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Wierzba | 44 | Head | Truck Driver | Illinois |
| 42 | Frances Wierzba | 32 | Wife | — | Illinois |
| 43 | Robert Wierzba | 17 | Son | — | Illinois |
| 44 | John Wierzba | 15 | Son | — | Illinois |
| 45 | Frances Wierzba | 7 | Daughter | — | Illinois |
| 46 | Zygmut Przybyszewski | 65 | Lodger | Watchman | Poland |
| 47 | Carl Schroeder | 34 | Head | Police Man | Illinois |
| 48 | Edna Schroeder | 32 | Wife | — | Illinois |
| 49 | Hugo Pierburg | 27 | Head | Ship Clerk | Germany |
| 50 | Helen Pierburg | 28 | Wife | — | Illinois |
| 51 | Paul Pierburg | 5 | Son | — | Illinois |
| 52 | Jacob Binderup | 46 | Head | Bread Man | Illinois |
| 53 | Emma Binderup | 41 | Wife | — | Illinois |
| 54 | Marie Binderup | 22 | Daughter | Grocery Clerk | Illinois |
| 55 | Ralph Binderup | 19 | Son | New Worker | Illinois |
| 56 | La Verne Binderup | 18 | Daughter | New Worker | Illinois |
| 57 | Richard Kelly | 46 | Head | Engineer | Illinois |
| 58 | Myrtle Kelly | 46 | Wife | — | Illinois |
| 59 | John Sr. Lucas THIS PERSON | 59 | Head | Carpenter | Scotland |
| 60 | Lena Lucas | 54 | Wife | — | Illinois |
| 61 | John Lucas | 27 | Son | Carpenter | Wisconsin |
| 62 | Albert Haack | 58 | Lodger | Salesman | Illinois |
| 63 | Paul Stoner | 36 | Lodger | Laborer | Illinois |
| 64 | John Sr. Kiernan | 66 | Head | Office Clerk | Illinois |
| 65 | Ida Kiernan | 59 | Wife | — | Illinois |
| 66 | John Jr. Kiernan | 22 | Son | Laborer | Illinois |
| 67 | Frank Dombek | 45 | Head | Truck Driver | Illinois |
| 68 | Felix Dombek | 40 | Wife | — | Illinois |
| 69 | Le Roy Dombek | 15 | Son | New Worker | Illinois |
| 70 | Casey B. Jaros | 53 | Head | Tailor | Illinois |
| 71 | Casey Mary Jaros | 20 | Daughter | Typist | Illinois |
| 72 | Salvatore De Salvo | 54 | Head | Mechanic | Italy |
| 73 | Mary De Salvo | 54 | Wife | — | Poland |
| 74 | Fred De Salvo | 21 | Son | Brakeman | Illinois |
| 75 | Louis De Salvo | 19 | Son | New Worker | Illinois |
| 76 | Salvatore Jr. De Salvo | 13 | Son | — | Illinois |
| 77 | Steve Wernick | 16 | Son | — | Illinois |
| 78 | Fred W. Brunkler | 89 | Head | — | Germany |
| 79 | Anna Brunkler | 74 | Wife | — | Germany |
| 80 | Robert Kovacs | 23 | Lodger | Manager | 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)