JH
John Hennessey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Will-County, Illinois
Our Model Tree links this John Hennessey across the 1930 and 1940 US Censuses in Will-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1895), then head of a 7-person household.
Age 45
b. ~1895
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Will-County, Illinois |
| Surname | Hennessey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Joliet City |
| 1935 Residence (County) | Will |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Joliet City |
| Est. Birth Year | ~1895 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Anna Hennessey | Spouse | — | 74 | ~1866 |
| John Hennessey | Son | — | 45 | ~1895 |
| Dennis Hennessey | Son | — | 40 | ~1900 |
| Daniel Hennessey | Son | — | 36 | ~1904 |
| David Hennessey | Head | — | 75 | ~1865 |
| Bertram Hennessey | Son | — | 38 | ~1902 |
| Charles Hennessey | Son | — | 34 | ~1906 |
Census Appearances
1930
Will, Illinois
Son, age 35
Will, Illinois · implied b. ~1895 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Teamster |
| Industry | General Carton Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Will-County, Illinois
Son, age 45
Will-County, Illinois · implied b. ~1895 — 7 household members
| Surname | Hennessey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Joliet City |
| 1935 Residence (County) | Will |
| Hours Worked | 0 |
| 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 John Hennessey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Hennessey
Son · 1940 · age 45 · b. ~1895 · Illinois
★ You are viewing this record
Sibling
Dennis Hennessey
Sibling · 1940 · age 40
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Hennessey
Sibling · 1940 · age 36
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Hennessey
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bertram Hennessey
Sibling · 1940 · age 38
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 — Will-County, Illinois
Open full size
1940 US Federal Census — Will-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00908-00402)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward Milliard | 60 | Head | Laborer | Illinois |
| 2 | Daisy Milliard | 58 | Wife | — | Illinois |
| 3 | James Chiapetta | 66 | Head | Proprietor | Italy |
| 4 | Mary Chiapetta | 56 | Wife | — | Italy |
| 5 | Louis F. Randolph | 38 | Head | Policeman | Illinois |
| 6 | Mary Randolph | 37 | Wife | — | Illinois |
| 7 | Lois Randolph | 15 | Daughter | — | Illinois |
| 8 | Jennie R. Randolph | 8 | Son | — | Illinois |
| 9 | Harold T. Booklund | 35 | Head | Machinist | Illinois |
| 10 | Helen Booklund | 27 | Wife | — | Illinois |
| 11 | James Booklund | 5 | Son | — | Illinois |
| 12 | Patsy Booklund | 4 | Daughter | — | Illinois |
| 13 | Kay Booklund | 2 | Daughter | — | Illinois |
| 14 | Judy Booklund | 1 | Daughter | — | Illinois |
| 15 | Mary Kapetanie | 45 | Head | — | Yugoslavia |
| 16 | Amil Kapetanie | 26 | Son | Roller | Illinois |
| 17 | Edward Kapetanie | 28 | Head | Janitor | Illinois |
| 18 | Margaret Kapetanie | 27 | Wife | General Factory Worker | Illinois |
| 19 | John L. Gorman | 59 | Head | Flag-Man | New York |
| 20 | Louisa Gorman | 64 | Wife | — | Illinois |
| 21 | Mae Gorman | 30 | Daughter | — | Illinois |
| 22 | Viola Gorman | 28 | Daughter | Saleswoman | Illinois |
| 23 | Rita Gorman | 18 | Daughter | Typist | Illinois |
| 24 | Valeria Gobrecht | 22 | Daughter | — | Illinois |
| 25 | Nancy Gobrecht | 1 | Daughter | — | Illinois |
| 26 | David S. Hennessey | 75 | Head | — | Illinois |
| 27 | Anna Hennessey | 74 | Wife | — | Illinois |
| 28 | John Hennessey THIS PERSON | 45 | Son | — | Illinois |
| 29 | Bertram Hennessey | 38 | Son | — | Illinois |
| 30 | Daniel Hennessey | 36 | Son | Laborer | Illinois |
| 31 | Charles A. Hennessey | 34 | Son | Bartender | Illinois |
| 32 | Dennis A. Hennessey | 40 | Son | Street Sweeper | Illinois |
| 33 | Raymond W. Eckert | 32 | Head | Janitor | Illinois |
| 34 | Ernestine Eckert | 26 | Wife | — | S. Carolina |
| 35 | Marcus Eckert | 6 | Son | — | Illinois |
| 36 | Tillie Eckert | 58 | Mother | — | Illinois |
| 37 | Robert D. Clark | 40 | Head | Truck Driver | Illinois |
| 38 | Irene Clark | 34 | Wife | — | Pennsylvania |
| 39 | Robert Allen Clark | 17 | Son | — | Illinois |
| 40 | Nancy June Clark | 9 | Daughter | — | 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)