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Helen Kennedy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Helen Kennedy across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 11-person household.
Age 19
b. ~1921
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Kennedy |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Switchboard Operator |
| Industry | Egg Market |
| Class of Worker | PW |
| Hours Worked | 4 |
| Income (1939) | 625 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Switchboard Operator |
| Township / Ward | Chicago |
| Est. Birth Year | ~1921 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| John O'Connell | Other | — | 3 | ~1937 |
| Jerome Kennedy | Son | — | 11 | ~1929 |
| Daniel O'Connell | Other | — | 33 | ~1907 |
| Ann Kennedy | Daughter | — | 22 | ~1918 |
| Margaret O'Connell | Other | — | 1 | ~1939 |
| Joanna Kennedy | Spouse | — | 48 | ~1892 |
| Michael Kennedy | Head | — | 56 | ~1884 |
| Helen Kennedy | Daughter | — | 19 | ~1921 |
| Robert Kennedy | Son | — | 13 | ~1927 |
| William O'Connell | Other | — | 2 | ~1938 |
| Ruth Kennedy | Daughter | — | 18 | ~1922 |
Census Appearances
1930
Cook, Illinois
Daughter, age 9
Cook, Illinois · implied b. ~1921 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| Age at First Marriage | W |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 19
Cook-County, Illinois · implied b. ~1921 — 11 household members
| Surname | Kennedy |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Switchboard Operator |
| Industry | Egg Market |
| Class of Worker | PW |
| Hours Worked | 4 |
| Income (1939) | 625 |
| 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 Helen Kennedy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Helen Kennedy
Daughter · 1940 · age 19 · b. ~1921 · Illinois
★ You are viewing this record
Sibling
Jerome Kennedy
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Kennedy
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Kennedy
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruth Kennedy
Sibling · 1940 · age 18
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-t0627-00982-00667)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Julia Boyce | 34 | Daughter | Private Secretary | Illinois |
| 42 | Marguerite Boyce | 25 | Daughter | Secretary | Illinois |
| 43 | James Boyce | 20 | Son | — | Illinois |
| 44 | Charles F. Ferris | 46 | Head | Locomotive Engineer | Iowa |
| 45 | Ruth Ferris | 34 | Wife | — | Iowa |
| 46 | Dale Williams | 14 | Son | — | Iowa |
| 47 | Addie Ferris | 74 | Mother | — | Iowa |
| 48 | James O'Grady | 51 | Head | Stockman | Illinois |
| 49 | Elizabeth O'Grady | 56 | Wife | — | Ireland |
| 50 | Eileen O'Grady | 25 | Daughter | — | Illinois |
| 51 | Mary Frances O'Grady | 22 | Daughter | Office Clerk | Illinois |
| 52 | James Jr. O'Grady | 18 | Son | Messenger Boy | Illinois |
| 53 | Annie Moran | 60 | Head | — | Free State |
| 54 | Marguerite Moran | 29 | Daughter | Office Clerk | Illinois |
| 55 | John J. O'Brien | 33 | Head | — | Illinois |
| 56 | Adela Ferris | 12 | Niece | — | Ohio |
| 57 | James Brierty | 45 | Head | Nurse | Illinois |
| 58 | Cecelia Brierty | 42 | Wife | Electrician | Illinois |
| 59 | Elizabeth Brierty | 9 | Daughter | — | Illinois |
| 60 | Cecelia H. Brierty | 2 | Daughter | — | Illinois |
| 61 | Thomas F. Murphy | 78 | Head | — | Illinois |
| 62 | Elizabeth Murphy | 68 | Wife | — | Illinois |
| 63 | Charles Murphy | 32 | Son | — | Illinois |
| 64 | Margaret Klawitter | 49 | Head | — | Free State |
| 65 | Marion J. Klawitter | 8 | Daughter | — | Illinois |
| 66 | Margaret Cline | 52 | Head | — | New Jersey |
| 67 | William Callaghan | 62 | Nephew | — | Illinois |
| 68 | Michael Kennedy | 56 | Head | Laborer | Illinois |
| 69 | Joanna Kennedy | 48 | Wife | — | Illinois |
| 70 | Ann Kennedy | 22 | Daughter | Stenographer | Illinois |
| 71 | Helen Kennedy THIS PERSON | 19 | Daughter | Switchboard Operator | Illinois |
| 72 | Ruth Kennedy | 18 | Daughter | — | Illinois |
| 73 | Robert Kennedy | 13 | Son | — | Illinois |
| 74 | Jerome Kennedy | 11 | Son | — | Illinois |
| 75 | Daniel O'Connell | 33 | Cousin | Special Agent | Free State |
| 76 | John O'Connell | 3 | Grand Son | — | Illinois |
| 77 | William O'Connell | 2 | Grand Son | — | Illinois |
| 78 | Margaret Ann O'Connell | 1 | Grand Daughter | — | Illinois |
| 79 | Matthew Smith | 70 | Head | — | Tennessee |
| 80 | Alice Smith | 64 | Wife | — | Illinois |
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)