JH
John Hennessey — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this John Hennessey across the 1920 and 1930 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 10-person household.
Age 12
b. ~1918
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Hennessey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1918 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Hennessey | Other | — | 42 | ~1888 |
| Marion Hennessey | Daughter | — | 13 | ~1917 |
| Kathleen Hennessey | Daughter | — | 8 | ~1922 |
| John Hennessey | Son | — | 12 | ~1918 |
| Sylvester Hennessey | Head | — | 48 | ~1882 |
| Sylvester Hennessey | Son | — | 17 | ~1913 |
| Helen Hennessey | Daughter | — | 15 | ~1915 |
| Robert Hennessey | Son | — | 6 | ~1924 |
| Dorothy Hennessey | Daughter | — | 4 | ~1926 |
| Patrick Hennessey | Son | — | 10 | ~1920 |
Census Appearances
1920
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1919 — 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 | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 12
Cook, Illinois · implied b. ~1918 — 10 household members
| Surname | Hennessey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| 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 (1920 and 1930) in Cook, Illinois, using XGBoost record linkage.
Show:
This person
Anchor record
John Hennessey
Son · 1930 · age 12 · b. ~1918 · Illinois
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Sibling
Helen Hennessey
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Hennessey
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sylvester Hennessey
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Hennessey
Sibling · 1930 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marion Hennessey
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Hennessey
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Hennessey
Sibling · 1930 · age 8
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
1930 US Federal Census — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel472:0596)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sylvester Hennessey | 48 | Head | Conductor | Ireland |
| 2 | Mary Hennessey | 42 | Wife-H | — | Ireland |
| 3 | Sylvester Jr. Hennessey | 17 | Son | Messenger | Illinois |
| 4 | Helen Hennessey | 15 | Daughter | — | Illinois |
| 5 | Marion Hennessey | 13 | Daughter | — | Illinois |
| 6 | John Hennessey THIS PERSON | 12 | Son | — | Illinois |
| 7 | Patrick Hennessey | 10 | Son | — | Illinois |
| 8 | Kathleen Hennessey | 8 | Daughter | — | Illinois |
| 9 | Robert Hennessey | 6 | Son | — | Illinois |
| 10 | Dorothy Hennessey | 4 | Daughter | — | Illinois |
| 11 | Margaret Cummins | 52 | Head-H | Laundress | Ireland |
| 12 | Philip Harris | 42 | Head | Accountant | Russia |
| 13 | Eliz. Harris | 36 | Wife-H | — | Russia |
| 14 | Rachel Harris | 11 | Daughter | — | Illinois |
| 15 | Pearl Harris | 8 | Daughter | — | Illinois |
| 16 | Sophie Beckerman | 25 | Sister-in-law | Saleslady | Russia |
| 17 | Mary Zollo | 20 | Maid | Housemaid | Poland |
| 18 | Sol Lotterman | 47 | Head | Designer | Russia |
| 19 | Annie Lotterman | 45 | Wife-H | — | Russia |
| 20 | Morris Lotterman | 24 | Son | Clerk | Russia |
| 21 | Philip Benton | 36 | Head | Salesman | Illinois |
| 22 | Minnie Benton | 32 | Wife-H | — | Illinois |
| 23 | Dorothy Benton | 14 | Daughter | — | Illinois |
| 24 | Lois Benton | 12 | Daughter | — | Illinois |
| 25 | George Benton | 10 | Son | — | Illinois |
| 26 | Gilbert Benton | 31 | Brother | Architect | Illinois |
| 27 | Isaac Gorman | 36 | Head | Accountant | Sweden |
| 28 | Theresa Gorman | 31 | Wife-H | — | Michigan |
| 29 | Violet Gorman | 13 | Daughter | — | Illinois |
| 30 | Gladys Gorman | 11 | Daughter | — | Illinois |
| 31 | Ruthy Gorman | 9 | Daughter | — | Illinois |
| 32 | Pearl Gorman | 4 | Son | — | Illinois |
| 33 | Charles Schube | 28 | Head | Motorman | Illinois |
| 34 | Ruth Schube | 25 | Wife-H | — | Illinois |
| 35 | Ruth H. Schube | 3 | Daughter | — | Illinois |
| 36 | Isaac Stephan | 53 | Head | Owner | Illinois |
| 37 | Ernestine Stephan | 53 | Wife-H | — | Germany |
| 38 | Ernest Stephan | 28 | Son | Conductor | Illinois |
| 39 | Isadore Stein | 45 | Head | Owner | Russia |
| 40 | Ethel Stein | 43 | Wife-H | — | Russia |
| 41 | Seymour Stein | 22 | Son | — | Illinois |
| 42 | Nathan Stein | 17 | Son | — | Illinois |
| 43 | Albert Luchs | 27 | Head | Proprietor | England |
| 44 | Anne Luchs | 26 | Wife-H | — | Illinois |
| 45 | Fred Luchs | 2 | Son | — | Illinois |
| 46 | Rena Luchs | 0 | Daughter | — | Illinois |
| 47 | Bernard Levinson | 49 | Head | Salesman | Russia |
| 48 | Alice Levinson | 37 | Wife-H | — | Russia |
| 49 | Leonard Levinson | 14 | Son | — | Illinois |
| 50 | Donald Levinson | 12 | Son | — | Illinois |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)