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Mary Hennessey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jackson-County, Missouri
Our Model Tree links this Mary Hennessey across the 1930 and 1940 US Censuses in Jackson-County, Missouri (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 7-person household.
Age 14
b. ~1926
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jackson-County, Missouri |
| Surname | Hennessey |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Kansas City |
| 1935 Residence (County) | Jackson |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same house |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | Kansas City |
| Est. Birth Year | ~1926 |
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 |
|---|---|---|---|---|
| Patrick Hennessey | Son | — | 10 | ~1930 |
| John Hennessey | Head | — | 53 | ~1887 |
| Mary Hennessey | Daughter | — | 14 | ~1926 |
| Josephine Hennessey | Daughter | — | 13 | ~1927 |
| John Hennessey | Son | — | 12 | ~1928 |
| Amanda Hennessey | Spouse | — | 49 | ~1891 |
| Eugene Hennessey | Son | — | 7 | ~1933 |
Census Appearances
1930
Jackson, Missouri
Daughter, age 4
Jackson, Missouri · implied b. ~1926 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessey |
| Given Name | Mary J. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Kansas |
| Occupation | none |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Jackson-County, Missouri
Daughter, age 14
Jackson-County, Missouri · implied b. ~1926 — 7 household members
| Surname | Hennessey |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Kansas City |
| 1935 Residence (County) | Jackson |
| Highest Grade | H-1 |
| 1935 Residence | Same house |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Hennessey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hennessey
Daughter · 1940 · age 14 · b. ~1926 · Missouri
★ You are viewing this record
Sibling
Patrick Hennessey
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Hennessey
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Hennessey
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Hennessey
Sibling · 1940 · age 12
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 — Jackson-County, Missouri
Open full size
1940 US Federal Census — Jackson-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02167-00590)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jack E. Smith | 4 | Son | — | Missouri |
| 2 | Arthur Brown | 53 | Head | Linotype Oper | Missouri |
| 3 | Freya Brown | 46 | Wife | — | Missouri |
| 4 | Buster Roden | 38 | Head | Laborer | Oklahoma |
| 5 | Ella Roden | 36 | Wife | — | Oklahoma |
| 6 | Carl Roden | 15 | Son | — | Missouri |
| 7 | Daphne Roden | 12 | Daughter | — | Oklahoma |
| 8 | Kenneth Roden | 10 | Son | — | Oklahoma |
| 9 | Barbara Roden | 9 | Daughter | — | Missouri |
| 10 | H. Donham | 63 | Head | Maintenance Man | Indiana |
| 11 | Clyde E. Mack | 54 | Head | — | Kansas |
| 12 | Alma R. Mack | 71 | Wife | — | Missouri |
| 13 | Forrest U. Jesse | 56 | Head | Truck Driver | Missouri |
| 14 | Ethel E. Jesse | 55 | Wife | Packer | Missouri |
| 15 | Raymond O. Ballard | 30 | Head | Packer | Kansas |
| 16 | Hazel Ballard | 28 | Wife | — | Oregon |
| 17 | Buddy D. Ballard | 9 | Son | — | Kansas |
| 18 | Herbert R. Ballard | 7 | Son | — | Missouri |
| 19 | Dean P. Harbaugh | 46 | Head | Shop Foreman | Ohio |
| 20 | Mary E. Harbaugh | 42 | Wife | Billing Clerk | Missouri |
| 21 | John P. Hennessey | 53 | Head | Inspector | Missouri |
| 22 | Amanda Hennessey | 49 | Wife | — | Kansas |
| 23 | Mary J. Hennessey THIS PERSON | 14 | Daughter | — | Missouri |
| 24 | Josephine A. Hennessey | 13 | Daughter | — | Missouri |
| 25 | John E. Hennessey | 12 | Son | — | Missouri |
| 26 | Patrick M. Hennessey | 10 | Son | — | Missouri |
| 27 | Eugene Hennessey | 7 | Son | — | Missouri |
| 28 | Thomas Decker | 70 | Head | — | Missouri |
| 29 | Ella J. Decker | 66 | Wife | — | Missouri |
| 30 | — | None | — | — | — |
| 31 | Thomas C. Donnelly | 55 | Head | Salesman | Missouri |
| 32 | Anna Sidwell | 65 | Aunt | — | Missouri |
| 33 | Frank Herzig | 47 | Head | Casing Dept | Austria |
| 34 | Anna M. Herzig | 47 | Wife | — | Missouri |
| 35 | Frank Jr. Herzig | 19 | Son | Cutter | Missouri |
| 36 | Richard Herzig | 16 | Son | Delivery Boy | Missouri |
| 37 | Mary J. Herzig | 14 | Daughter | — | Missouri |
| 38 | Charles Stumberger | 46 | Head | Car Inspector | Jugo Slavia |
| 39 | Mary Stumberger | 37 | Wife | — | Jugo Slavia |
| 40 | Charles Jr. Stumberger | 18 | Son | — | Kansas |
Related Census Records
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)