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John Kennedy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this John Kennedy across the 1910, 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Patrick & Mary — first a head (b.~1904), then head of a 7-person household.
Age 36
b. ~1904
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Kennedy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Underwriter |
| Industry | Insurance Co. |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1800 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Underwriter |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1904 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Betty Kennedy | Daughter | — | 5 | ~1935 |
| John Kennedy | Head | — | 36 | ~1904 |
| Patrick Kennedy | Other | — | 70 | ~1870 |
| James Dowling | Other | — | 5 | ~1935 |
| Mary Dowling | Other | — | 42 | ~1898 |
| Patrick Kennedy | Son | — | 3 | ~1937 |
| Vera Kennedy | Spouse | — | 32 | ~1908 |
Census Appearances
1910
Cook, Illinois
Son, age 5
Cook, Illinois · implied b. ~1905 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Cook, Illinois
Son, age 16
Cook, Illinois · implied b. ~1904 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Clerk |
| Industry | Railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 26
Cook, Illinois · implied b. ~1904 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| Age at First Marriage | No |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Electrician |
| Industry | Building Construction |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Head, age 36
Cook-County, Illinois · implied b. ~1904 — 7 household members
| Surname | Kennedy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Underwriter |
| Industry | Insurance Co. |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1800 |
| Highest Grade | Hs 4 |
| 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 John Kennedy across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Patrick Kennedy (~0.92 confidence) and mother Mary Kennedy (~0.92 confidence) and mother Mary Kennedy (~0.92 confidence) and mother Nora Kennedy (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Patrick Kennedy
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Mary Kennedy
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Mary Kennedy
b. ~1872
Source mother
● Household
· direct · ~0.92
Mother
Nora Kennedy
b. ~1857
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Kennedy
Head · 1940 · age 36 · b. ~1904 · 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-t0627-00952-00446)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ruth Horovitz | 22 | Daughter | Salesgirl | Illinois |
| 2 | Rochelle Horovitz | 11 | Daughter | — | Illinois |
| 3 | John Calhoun | 44 | Head | Electrician | Illinois |
| 4 | Marcella Calhoun | 46 | Wife | — | Pennsylvania |
| 5 | Frank Baussas | 27 | Head | Machinist | Illinois |
| 6 | Ruth Baussas | 25 | Wife | — | Illinois |
| 7 | Richard Baussas | 1 | Son | — | Illinois |
| 8 | Charles Navratil | 45 | Head | Car Inspector | Illinois |
| 9 | Mary Navratil | 43 | Wife | — | Czechoslovakia |
| 10 | Evelyn Navratil | 15 | Daughter | — | Illinois |
| 11 | Irene Navratil | 10 | Daughter | — | Illinois |
| 12 | Anne M. Dobson | 55 | Head | Payroll Clerk | England |
| 13 | Florence Machin | 51 | Sister | — | England |
| 14 | John Kennedy THIS PERSON | 36 | Head | Underwriter | Illinois |
| 15 | Vera Kennedy | 32 | Wife | — | Massachusetts |
| 16 | Betty Mae Kennedy | 5 | Daughter | — | Illinois |
| 17 | Patrick Kennedy | 3 | Son | — | Illinois |
| 18 | Patrick Kennedy | 70 | Father | — | Ireland |
| 19 | Mary Dowling | 42 | Sister | — | Illinois |
| 20 | James Dowling | 5 | Nephew | — | Illinois |
| 21 | John M. Herr | 57 | Head | Clerical | Illinois |
| 22 | Madge Herr | 52 | Wife | — | Illinois |
| 23 | Frank Herr | 26 | Son | Truck Driver | Illinois |
| 24 | Mccormac Mccall | 67 | Head | Contractor | Minnesota |
| 25 | Birdie Mccall | 57 | Wife | — | Illinois |
| 26 | Eugene Mccarthy | 27 | Step-son | — | New York |
| 27 | Dan Mccarthy | 49 | Brother | — | Illinois |
| 28 | John Mccall | 59 | Head | Contractor | Minnesota |
| 29 | Lucille Mccall | 20 | Daughter | — | Illinois |
| 30 | John Jr. Mccall | 24 | Son | Clerk | Illinois |
| 31 | Raymond Lecture | 28 | Head | Chemist | Minnesota |
| 32 | Eleanor Lecture | 27 | Wife | — | Illinois |
| 33 | Barbara Lecture | 3 | Daughter | — | Illinois |
| 34 | Raymond Lecture | 1 | Son | — | Illinois |
| 35 | Oliver Olivieri | 49 | Head | Marble Setter | Argentina |
| 36 | Bena Olivieri | 42 | Wife | — | Italy |
| 37 | Vernon Olivieri | 17 | Son | — | Illinois |
| 38 | Beatrice Olivieri | 15 | Daughter | — | Illinois |
| 39 | Mitro Wanda | 56 | Head | Carpenter | Austria |
| 40 | Mary Wanda | 52 | Wife | — | Austria |
Pedigree Summary
John
Gen 1 · 4 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)