JK
John Kennedy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Winnebago-County, Illinois
Our Model Tree links this John Kennedy across the 1920, 1930 and 1940 US Censuses in Winnebago-County, Illinois (XGBoost, ~Confirmed), with identified parents Homer & Naomi — first a head (b.~1909), then head of a 3-person household.
Age 31
b. ~1909
Male
Head
Born: Nebraska
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Winnebago-County, Illinois |
| Surname | Kennedy |
| Given Name | John G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Nebraska |
| 1935 Residence (City) | Rockford city |
| 1935 Residence (County) | Winnebago |
| Additional Details | |
| Occupation | Salesman |
| Industry | Plumbing & Heating Supply |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 298 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
| Occupation | Salesman |
| Township / Ward | Rockford City |
| Est. Birth Year | ~1909 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Kennedy | Head | — | 31 | ~1909 |
| John Kennedy | Son | — | 1 | ~1939 |
| Marian Kennedy | Spouse | — | 31 | ~1909 |
Census Appearances
1920
Winnebago, Illinois
Son, age 11
Winnebago, Illinois · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1930
Winnebago, Illinois
Son, age 21
Winnebago, Illinois · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Nebraska |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Pennsylvania |
| Occupation | Clerk |
| Industry | Brass Works |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
1940
Winnebago-County, Illinois
Head, age 31
Winnebago-County, Illinois · implied b. ~1909 — 3 household members
| Surname | Kennedy |
| Given Name | John G. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Nebraska |
| 1935 Residence (City) | Rockford city |
| 1935 Residence (County) | Winnebago |
| Occupation | Salesman |
| Industry | Plumbing & Heating Supply |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 298 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Nebraska |
| Birth Country | United States |
| Birthplace (normalized) | nebraska |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Homer Kennedy (~0.92 confidence) and mother Naomi Kennedy (~0.92 confidence) and mother Naomi Kennedy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Homer Kennedy
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Naomi Kennedy
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Naomi Kennedy
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Kennedy
Head · 1940 · age 31 · b. ~1909 · 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 — Winnebago-County, Illinois
Open full size
1940 US Federal Census — Winnebago-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00914-00320)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Loretta Whitcher | 45 | Wife | — | Illinois |
| 2 | Donald Whitcher | 18 | Son | — | Illinois |
| 3 | Beatrice Whitcher | 16 | Daughter | — | Illinois |
| 4 | Robert Collins | 28 | Head | Clerk | Illinois |
| 5 | Norma B. Collins | 27 | Wife | — | Illinois |
| 6 | Robert Collins | 11 | Son | — | Illinois |
| 7 | Harold M. D. Dixon | 28 | Head | Physician | Missouri |
| 8 | Helen Dixon | 26 | Wife | — | Illinois |
| 9 | Oliver Gleichman | 47 | Head | Owner | New Jersey |
| 10 | Irene Gleichman | 42 | Wife | — | Kansas |
| 11 | Suzanne Gleichman | 15 | Daughter | — | Illinois |
| 12 | Donald Gleichman | 11 | Son | — | Illinois |
| 13 | Margreta Gleichman | 11 | Daughter | — | Illinois |
| 14 | R. Gilbert Nelson | 41 | Head | Reader Office | Illinois |
| 15 | Mable Nelson | 41 | Wife | — | Illinois |
| 16 | Richard Nelson | 19 | Son | Trucker | Illinois |
| 17 | Katherine Nelson | 5 | Daughter | — | Illinois |
| 18 | John G. Kennedy THIS PERSON | 31 | Head | Salesman | Nebraska |
| 19 | Marian Kennedy | 31 | Wife | — | Illinois |
| 20 | John G. Jr. Kennedy | 1 | Son | — | Illinois |
| 21 | Roy Baum | 39 | Head | Lineman | Ohio |
| 22 | Margaret Baum | 31 | Wife | — | Nebraska |
| 23 | Barbara Baum | 9 | Daughter | — | Daughter |
| 24 | Joanne Baum | 6 | Daughter | — | Daughter |
| 25 | Lewis B. Robinson | 74 | Head | Collector | Kentucky |
| 26 | Ellen Robinson | 73 | Wife | — | Tennessee |
| 27 | Clarence Johnston | 44 | Head | Musician | Pennsylvania |
| 28 | Lydia Johnston | 42 | Wife | — | Illinois |
| 29 | Richard Johnston | 16 | Son | — | Illinois |
| 30 | Patricia Johnston | 5 | Daughter | — | Illinois |
| 31 | Edward Layman | 46 | Head | Machinist | W. Virginia |
| 32 | Gettie Layman | 44 | Wife | — | W. Virginia |
| 33 | Thelma Layman | 24 | Daughter | Assembler | Illinois |
| 34 | Walter Layman | 15 | Son | — | Illinois |
| 35 | Frank Cosgrove | 50 | Head | Salesman | New York |
| 36 | Phyllis Cosgrove | 45 | Wife | — | Illinois |
| 37 | Mary Cosgrove | 18 | Daughter | Attendant | Illinois |
| 38 | Clarence Mchill | 51 | Head | Carpenter | Pennsylvania |
| 39 | Gertrude Mchill | 44 | Wife | — | Illinois |
| 40 | Maurice Mchill | 21 | Son | Machinist | Illinois |
Pedigree Summary
John
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)