MH
Mary Hennessy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hamilton-County, Ohio
Our Model Tree links this Mary Hennessy across the 1930 and 1940 US Censuses in Hamilton-County, Ohio (XGBoost, ~Confirmed) — first a daughter (b.~1916), then head of a 7-person household.
Age 24
b. ~1916
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hamilton-County, Ohio |
| Surname | Hennessy |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cincinnati |
| 1935 Residence (County) | Hamilton |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Cincinnati |
| Est. Birth Year | ~1916 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Francis Hennessy | Son | — | 18 | ~1922 |
| Bernard Hennessy | Son | — | 14 | ~1926 |
| John Hennessy | Son | — | 22 | ~1918 |
| Mary Hennessy | Daughter | — | 24 | ~1916 |
| Thomas Hennessy | Head | — | 55 | ~1885 |
| Charles Hennessy | Son | — | 20 | ~1920 |
| Mary Hennessy | Spouse | — | 50 | ~1890 |
Census Appearances
1930
Hamilton, Ohio
Other, age 14
Hamilton, Ohio · implied b. ~1916 — 42 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessy |
| Given Name | Marie |
| Relationship to Head | Pupil |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Hamilton-County, Ohio
Daughter, age 24
Hamilton-County, Ohio · implied b. ~1916 — 7 household members
| Surname | Hennessy |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cincinnati |
| 1935 Residence (County) | Hamilton |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hennessy
Daughter · 1940 · age 24 · b. ~1916 · Ohio
★ You are viewing this record
Sibling
John Hennessy
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Hennessy
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Hennessy
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Hennessy
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 — Hamilton-County, Ohio
Open full size
1940 US Federal Census — Hamilton-County, Ohio
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03190-00821)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Robinson | 54 | Head | Power Mail | Ohio |
| 42 | Sarah Robinson | 52 | Wife | — | Irish Free State |
| 43 | William Robinson | 19 | Son | Apprentice | Ohio |
| 44 | John Robinson | 17 | Son | Delivery Boy | Ohio |
| 45 | Mary Robinson | 15 | Daughter | — | Ohio |
| 46 | Richard Robinson | 14 | Son | — | Ohio |
| 47 | Thomas Robinson | 12 | Son | — | Ohio |
| 48 | Harry Robinson | 7 | Son | — | Ohio |
| 49 | Edward T. Evans | 61 | Head | Foreman | Ohio |
| 50 | Esther L. Evans | 62 | Wife | — | Ohio |
| 51 | Anna Marie Evans | 27 | Daughter | Teacher | Ohio |
| 52 | William Phillips | 76 | Head | — | England |
| 53 | Emma Phillips | 74 | Wife | — | Kentucky |
| 54 | Thomas Hennessy | 55 | Head | Electro-Typer | Ohio |
| 55 | Mary Hennessy | 50 | Wife | — | Ohio |
| 56 | Mary Louise Hennessy THIS PERSON | 24 | Daughter | — | Ohio |
| 57 | John Hennessy | 22 | Son | Printer | Ohio |
| 58 | Charles Hennessy | 20 | Son | Contractor | Ohio |
| 59 | Francis Hennessy | 18 | Son | Office Work | Ohio |
| 60 | Bernard Hennessy | 14 | Son | — | Ohio |
| 61 | Harry A. Tobin | None | Head | — | — |
| 62 | Luetta Tobin | None | Wife | — | — |
| 63 | Ruth Tobin | None | Daughter | — | — |
| 64 | James Tobin | None | Son | — | — |
| 65 | Rose Tobin | None | Daughter | — | — |
| 66 | Harry J. Tobin | None | Son | — | — |
| 67 | Harry C. Wick | 52 | Head | Salesman | Ohio |
| 68 | Lillian Wick | 46 | Wife | — | Illinois |
| 69 | Louise C. Krebs | 60 | Head | Teacher | Ohio |
| 70 | Minnie Hornberger | 84 | Aunt | — | Ohio |
| 71 | Margaret Jasper | 54 | Head | — | Ohio |
| 72 | Dorothy Jasper | 29 | Daughter | Bookkeeper | Ohio |
| 73 | Margaret Jasper | 26 | Daughter | Stenographer | Ohio |
| 74 | Edward Jasper | 23 | Son | Billing Clerk | Ohio |
| 75 | Catherine Delaney | 82 | Mother | — | Indiana |
| 77 | Ella Schledorn | 50 | Head | — | Ohio |
| 78 | Robert Schledorn | 18 | Son | — | Ohio |
| 79 | Maggie C. Jervis | 71 | Head | — | Ohio |
| 80 | Thomas C. Jervis | 40 | Son | C.P.A. Accountant | Ohio |
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)