WK
William Kennedy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this William Kennedy across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Anna — first a son (b.~1916), then head of a 4-person household.
Age 24
b. ~1916
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Kennedy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Draftsman |
| Industry | Steel Co. |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 900 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Draftsman |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1916 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Lucille Kennedy | Daughter | — | 20 | ~1920 |
| Rose Kennedy | Daughter | — | 31 | ~1909 |
| Anna Kennedy | Head | — | 58 | ~1882 |
| William Kennedy | Son | — | 24 | ~1916 |
Census Appearances
1920
Cook, Illinois
Son, age 4
Cook, Illinois · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 14
Cook, Illinois · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Age at First Marriage | 14 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 24
Cook-County, Illinois · implied b. ~1916 — 4 household members
| Surname | Kennedy |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Draftsman |
| Industry | Steel Co. |
| Class of Worker | PW |
| Hours Worked | 35 |
| Income (1939) | 900 |
| Highest Grade | H 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 William Kennedy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Kennedy (~0.92 confidence) and mother Anna Kennedy (~0.92 confidence) and mother Anna Kennedy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Kennedy
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Anna Kennedy
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Anna Kennedy
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Kennedy
Son · 1940 · age 24 · b. ~1916 · Illinois
★ You are viewing this record
Sibling
Lucille Kennedy
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Kennedy
Sibling · 1940 · age 31
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-t0627-01002-00369)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anna Kennedy | 58 | Head | — | Illinois |
| 42 | Rose Kennedy | 31 | Daughter | Stenographer | Illinois |
| 43 | William Kennedy THIS PERSON | 24 | Son | Draftsman | Illinois |
| 44 | Lucille Kennedy | 20 | Daughter | Credit Clerk | Illinois |
| 45 | Walter Rau | 38 | Head | Salesman | Missouri |
| 46 | Carolyn Rau | 28 | Wife | Stenographer | Illinois |
| 47 | Camille Sutter | 33 | Head | Milkman | Ohio |
| 48 | Muriel Sutter | 26 | Wife | — | Wisconsin |
| 49 | Muriel Sutter | 0 | Daughter | — | Illinois |
| 50 | Boris Machutinsky | 40 | Head | Lumberman | Russia |
| 51 | Bella Machutinsky | 40 | Wife | — | Russia |
| 52 | Sarah Machutinsky | 19 | Daughter | — | Russia |
| 53 | Rhea Machutinsky | 10 | Daughter | — | Danzig |
| 54 | Melvin Keller | 31 | Head | Truck Driver | Illinois |
| 55 | Lucille Keller | 25 | Wife | — | Illinois |
| 56 | June Keller | 2 | Daughter | — | Illinois |
| 57 | Lorraine Keller | 0 | Daughter | — | Illinois |
| 58 | Willard Miller | 35 | Head | Baker | Indiana |
| 59 | Olga Miller | 29 | Wife | — | Sweden |
| 60 | David Miller | 2 | Son | — | Illinois |
| 61 | Halvar Ahlberg | 35 | Head | Truck Driver | Sweden |
| 62 | Gerda Ahlberg | 36 | Wife | Housework | Sweden |
| 63 | Nancy Ahlberg | 13 | Daughter | — | Sweden |
| 64 | Blair Ahlberg | 11 | Daughter | — | Illinois |
| 65 | Felix Yasinski | 30 | Head | Sheet Metal Worker | West Virginia |
| 66 | Helen Yasinski | 23 | Wife | — | Illinois |
| 67 | Richard Yasinski | 3 | Son | — | Illinois |
| 68 | Dorothy Yasinski | 0 | Daughter | — | Illinois |
| 69 | Edward Weir | 27 | Head | Service Man | Illinois |
| 70 | Joan Weir | 24 | Wife | — | Illinois |
| 71 | Jeanette Weir | 4 | Daughter | — | Illinois |
| 72 | James Weir | 0 | Son | — | Illinois |
| 73 | Charles Sagan | 45 | Head | Barber | Austria |
| 74 | Mae Sagan | 38 | Wife | — | Illinois |
| 75 | John Sagan | 16 | Son | — | Illinois |
| 76 | Richard Sagan | 9 | Son | — | Illinois |
| 77 | John Dollan | 76 | Head | — | Scotland |
| 78 | Mary Dollan | 74 | Wife | — | Scotland |
| 79 | Lydia Komm | 47 | Daughter | Candy Packer | Illinois |
| 80 | Barbara Dollan | 42 | Daughter | Attendant | Illinois |
Pedigree Summary
William + 2 siblings
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)