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James Kennedy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this James Kennedy across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Martha & James — first a son (b.~1909), then head of a 2-person household.
Age 31
b. ~1909
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Kennedy |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Clerk |
| Industry | Rail Road Co |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 266 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Clerk |
| Township / Ward | Chicago |
| 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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Martha Kennedy | Head | — | 63 | ~1877 |
| James Kennedy | Son | — | 31 | ~1909 |
Census Appearances
1920
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1909 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | School |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 21
Cook, Illinois · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Clerk |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 31
Cook-County, Illinois · implied b. ~1909 — 2 household members
| Surname | Kennedy |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Clerk |
| Industry | Rail Road Co |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 266 |
| 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 James Kennedy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Martha Kennedy (~0.92 confidence) and father James Kennedy (~0.92 confidence) and mother Mary Kennedy (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Martha Kennedy
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
James Kennedy
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Mary Kennedy
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Kennedy
Son · 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 — 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-t0627-00979-00841)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Affred Clancey | 11 | Son | — | Illinois |
| 2 | Arthur Brennan | 46 | Head | Shipping Clerk | England |
| 3 | Rose Brennan | 44 | Wife | — | England |
| 4 | Arthur Brennan | 17 | Son | New Worker | Canada-Eng |
| 5 | John E Sullivan | 68 | Head | — | Illinois |
| 6 | Mary J Sullivan | 58 | Wife | — | Ireland |
| 7 | Arthur J Sullivan | 35 | Son | Salesman | Illinois |
| 8 | James Mullen | 54 | Head | Laborer | Ireland |
| 9 | Rose Mullen | 52 | Wife | — | Ireland |
| 10 | James Mullen | 27 | Son | Chauffeur | Illinois |
| 11 | Robert Mullen | 25 | Son | Chauffeur | Illinois |
| 12 | Mary Mullen | 17 | Daughter | — | Illinois |
| 13 | William H Steele | 27 | Son-in-law | Motor Man | Illinois |
| 14 | Rosalie Steele | 28 | Daughter | Clerk | Illinois |
| 15 | Martha Kennedy | 63 | Head | — | Ireland |
| 16 | James Kennedy THIS PERSON | 31 | Son | Clerk | Illinois |
| 17 | Bridget Thogent | 68 | Head | — | Ireland |
| 18 | Mary Thogent | 43 | Daughter | Clerk | Illinois |
| 19 | John Thogent | 43 | Son | Renewal Worker | Illinois |
| 20 | Edward Thogent | 35 | Son | Clerk | Illinois |
| 21 | Alice Thogent | 28 | Daughter | Saleslady | Illinois |
| 22 | John Connolly | 37 | Head | Laborer | Ireland |
| 23 | Arthur Connolly | 38 | Wife | — | Ireland |
| 24 | Catherine Connolly | 14 | Daughter | — | Illinois |
| 25 | Winifred Connolly | 12 | Daughter | — | Illinois |
| 26 | John Connolly | 10 | Son | — | Illinois |
| 27 | Thomas Connolly | 6 | Son | — | Illinois |
| 28 | Edward Connolly | 2 | Son | — | Illinois |
| 29 | William Tobin | 50 | Head | — | Illinois |
| 30 | Nora Tobin | 47 | Wife | — | Ireland |
| 31 | William Tobin | 25 | Son | Checker | Illinois |
| 32 | Helen Tobin | 20 | Daughter | Stenographer | Illinois |
| 33 | Mary Tobin | 12 | Daughter | — | Illinois |
| 34 | Bernadette Tobin | 10 | Daughter | — | Illinois |
| 35 | Frank Mchugh | 22 | Lodger | Painter | Missouri |
| 36 | Earl Larkin | 36 | Head | Baker | Illinois |
| 37 | Rose Larkin | 33 | Wife | — | Illinois |
| 38 | Earl Larkin | 10 | Son | — | Illinois |
| 39 | Donald Larkin | 8 | Son | — | Illinois |
| 40 | James Larkin | 1 | Son | — | Illinois |
Pedigree Summary
James
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)