MH
Mary Hennessy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Hennessy across the 1920, 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1880), then head of a 6-person household.
Age 50
b. ~1880
Female
Spouse
Born: Ireland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1890 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1880 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Hennessy | Spouse | — | 50 | ~1880 |
| Marie Harte | Other | — | 25 | ~1905 |
| Tom Hennessy | Head | — | 52 | ~1878 |
| John Harte | Son | — | 22 | ~1908 |
| Emmet Harte | Son | — | 17 | ~1913 |
| James Harte | Son | — | 25 | ~1905 |
Census Appearances
1920
Cook, Illinois
Spouse, age 40
Cook, Illinois · implied b. ~1880 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessy |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1892 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1895 |
| Birthplace (normalized) | ireland |
1930
Cook, Illinois
Spouse, age 50
Cook, Illinois · implied b. ~1880 — 6 household members
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1890 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
Spouse, age 60
Cook-County, Illinois · implied b. ~1880 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessey |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Mary Hennessy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hennessy
Spouse · 1930 · age 50 · b. ~1880 · Illinois
★ You are viewing this record
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:illinoiscensus00reel457:1089)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Paul Palkovitz | 44 | Head | Clerk | Russia |
| 2 | Betty Palkovitz | 38 | Wife | — | Russia |
| 3 | Sidney Osinger | 41 | Head | Rooming House Keeper | Michigan |
| 4 | Freda Osinger | 34 | Wife | Housewife | Chicago |
| 5 | Dorothy Hartwick | 15 | Daughter | School | Chicago |
| 6 | Robert Hartwick | 12 | Son | School | Chicago |
| 7 | Henry Osinger | 3 | Son | — | Chicago |
| 8 | Phyllis Osinger | 0 | Daughter | — | Chicago |
| 9 | Evelyn Hanson | 56 | Head | Rooming House Keeper | Indiana |
| 10 | Gus Anderson | 57 | Lodger | Labor | Sweden |
| 11 | Gus Dewey | 60 | Lodger | Labor | Sweden |
| 12 | Robert Frost | 59 | Lodger | Jewelry Repairer | New York |
| 13 | Frank Smith | 34 | Head | Labor | California |
| 14 | Charles Kalvaim | 54 | Head | Engineer | Canada |
| 15 | Emilia Jeffery | 50 | Head | General House Work | Nebraska |
| 16 | Andrew Galata | 40 | Head | Labor | Czecho-Slov. |
| 17 | Joe Laxbauch | 49 | Head | Labor | Slovakia |
| 18 | Frank Wilson | 35 | Head | Labor | Finland |
| 19 | James Smith | 44 | Head | Labor | New York |
| 20 | Katherine Smith | 38 | Wife | Housewife | Ireland |
| 21 | Walter Bach | 37 | Head | Painter | Indiana |
| 22 | John Stahls | 30 | Head | Labor | Lith. |
| 23 | Julia Kelly | 40 | Head | Dressmaker | Ohio |
| 24 | Jack Day | 43 | Head | Labor | Illinois |
| 25 | William John | 48 | Head | Labor | England |
| 26 | Martin Mellon | 35 | Head | Labor | Ireland |
| 27 | Lawrence Kuzminsky | 40 | Head | Labor | Illinois |
| 28 | Matthew Truston | 33 | Head | Labor | Old Mexico |
| 29 | Gunner Anderson | 48 | Head | Rooming House Keeper | Illinois |
| 30 | Frank Boron | 52 | Lodger | Labor | Ohio |
| 31 | Magnus Peterson | 57 | Head | Manager Market | Chicago |
| 32 | Joseph Stewart | 38 | Head | Chauffeur | Illinois |
| 33 | Mamie Stewart | 19 | Wife | Housewife | Chicago |
| 34 | Ben Arnold | 49 | Head | Labor | Kentucky |
| 35 | Alice Arnold | 23 | Wife | Housewife | Kentucky |
| 36 | Tracy Arnold | 22 | Son | Labor | Kentucky |
| 37 | Howard Arnold | 20 | Son | Labor | Kentucky |
| 38 | Violet Arnold | 16 | Daughter | — | Michigan |
| 39 | Lella Arnold | 5 | Daughter | — | Chicago |
| 40 | Gus Thepit | 34 | Head | Labor | Germany |
| 41 | Robert Cruves | 45 | Head | Labor | Bohemia |
| 42 | Tom Hennessy | 52 | Head | Labor | Ireland |
| 43 | Mary Hennessy THIS PERSON | 50 | Wife | — | Ireland |
| 44 | John Harte | 22 | Son | — | Chicago |
| 45 | Emmet Harte | 17 | Son | — | Chicago |
| 46 | James Harte | 25 | Son | Labor | Chicago |
| 47 | Marie Harte | 25 | Daughter-in-law | — | Belgium |
| 48 | Harry Sweet | 63 | Head | Farmer | Illinois |
| 49 | Ida Sweet | 63 | Wife | Housewife | Canada |
| 50 | Betty Sweet | 5 | Daughter | — | Ohio |
Related Census Records
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)