TK
Thomas Kennedy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Thomas Kennedy across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents John & David — first a son (b.~1911), then head of a 6-person household.
Age 29
b. ~1911
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Kennedy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| Additional Details | |
| Hours Worked | 36 |
| Highest Grade | No 8 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1911 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Mary Kennedy | Daughter | — | 33 | ~1907 |
| Patrick Kennedy | Head | — | 60 | ~1880 |
| John Kennedy | Son | — | 35 | ~1905 |
| Joseph Kennedy | Son | — | 28 | ~1912 |
| Thomas Kennedy | Son | — | 29 | ~1911 |
| Nora Kennedy | Spouse | — | 51 | ~1889 |
Census Appearances
1920
Cook, Illinois
Son, age 7
Cook, Illinois · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 18
Cook, Illinois · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | Thomas |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 29
Cook-County, Illinois · implied b. ~1911 — 6 household members
| Surname | Kennedy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| Hours Worked | 36 |
| Highest Grade | No 8 |
| 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 Thomas 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 father David Kennedy (~0.92 confidence) and father Patrick Kennedy (~0.92 confidence) and mother Margaret Kennedy (~0.92 confidence) and mother Nora Kennedy (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Kennedy
b. ~1876
Source father
● Household
· direct · ~0.92
Father
David Kennedy
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Patrick Kennedy
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Margaret Kennedy
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Nora Kennedy
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Kennedy
Son · 1940 · age 29 · b. ~1911 · Illinois
★ You are viewing this record
Sibling
John Kennedy
Sibling · 1940 · age 35
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Kennedy
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Kennedy
Sibling · 1940 · age 28
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-t0627-00958-00452)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eloise Matthies | 12 | Daughter | — | Illinois |
| 2 | Bridget Henry | 62 | Sister | Fore Lady | Irish Free State |
| 3 | George Stemler | 55 | In-law | Machinist | Indiana |
| 4 | Myron Mcinerney | 48 | Head | Owner | Illinois |
| 5 | Alice Mcinerney | 48 | Wife | Bookkeeper | Illinois |
| 6 | Stanley Larson | 43 | Head | Office Clerk | Illinois |
| 7 | Margaret Larson | 40 | Wife | — | Wash. D.C. |
| 8 | Robert Larson | 6 | Son | — | Illinois |
| 9 | Patrick Kennedy | 60 | Head | Corker | Irish Free State |
| 10 | Nora Kennedy | 51 | Wife | — | Irish Free State |
| 11 | Joseph Kennedy | 28 | Son | Police Man | Illinois |
| 12 | John Kennedy | 35 | Son | Fireman | Illinois |
| 13 | Mary Kennedy | 33 | Daughter | Stenographer | Illinois |
| 14 | Thomas Kennedy THIS PERSON | 29 | Son | — | Illinois |
| 15 | Frank Avery | 69 | Head | Cattle Man | New York |
| 16 | John Carney | 36 | Brother | Switchman | Illinois |
| 17 | Lotta Carney | 32 | Sister | — | Illinois |
| 18 | Francis Carney | 0 | Nephew | — | Illinois |
| 19 | Thomas O'Malley | 40 | Lodger | Washer | Illinois |
| 20 | Thomas Carroll | 40 | Head | Shipping Clerk | Illinois |
| 21 | Mabel Carroll | 40 | Wife | — | Illinois |
| 22 | Mary Carroll | 11 | Daughter | — | Illinois |
| 23 | Dorothy Carroll | 11 | Daughter | — | Illinois |
| 24 | Thomas Carroll | 3 | Son | — | Illinois |
| 25 | Elizabeth Mckillop | 72 | Head | Teacher | Illinois |
| 26 | Mary Mesche | 59 | Boarder | Stenographer | Illinois |
| 27 | William J. Twohy | 63 | Head | — | Ireland |
| 28 | Catherine Twohy | 63 | Wife | — | Northern Ireland |
| 29 | William Jr. Twohy | 38 | Son | Police Man | Illinois |
| 30 | Catherine Twohy | 15 | Grand Daughter | — | Illinois |
| 31 | Marie Twohy | 15 | Grand Daughter | — | Illinois |
| 32 | Helen Twohy | 32 | Daughter-in-law | — | Illinois |
| 33 | William Iii Twohy | 10 | Grand Son | — | Illinois |
| 34 | Dorothy Twohy | 15 | Grand Daughter | — | Illinois |
| 35 | Ruth Mallen | 28 | House Maid | House Maid | Illinois |
| 36 | Patrick Shanahan | 79 | Head | — | Ireland |
| 37 | Dan J. Horan | 49 | Son-in-law | Fireman | Illinois |
| 38 | John J. Horan | 22 | Grand Son | Clerk | Illinois |
| 39 | Dan Jr. Horan | 20 | Grand Son | — | Illinois |
| 40 | Rita Horan | 17 | Grand Daughter | — | Illinois |
Related Census Records
Pedigree Summary
Thomas + 3 siblings
Gen 1 · 5 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)