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Mary Hennessy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Fayette-County, Pennsylvania
Our Model Tree links this Mary Hennessy across the 1930 and 1940 US Censuses in Fayette-County, Pennsylvania (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 7-person household.
Age 15
b. ~1925
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Fayette-County, Pennsylvania |
| Surname | Hennessy |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Lower Tyrone Twp. |
| 1935 Residence (County) | Fayette |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Lower Tyrone Twp |
| Est. Birth Year | ~1925 |
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 |
|---|---|---|---|---|
| James Hennessy | Son | — | 13 | ~1927 |
| Mary Hennessy | Daughter | — | 15 | ~1925 |
| Harold Hennessy | Son | — | 17 | ~1923 |
| William Hennessy | Son | — | 24 | ~1916 |
| George Hennessy | Head | — | 54 | ~1886 |
| Margaret Hennessy | Spouse | — | 40 | ~1900 |
| Thomas Hennessy | Son | — | 16 | ~1924 |
Census Appearances
Daughter, age 5
Fayette, Pennsylvania · implied b. ~1925 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessey |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Fayette-County, Pennsylvania
Daughter, age 15
Fayette-County, Pennsylvania · implied b. ~1925 — 7 household members
| Surname | Hennessy |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Lower Tyrone Twp. |
| 1935 Residence (County) | Fayette |
| Highest Grade | No 8 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 15 · b. ~1925 · Pennsylvania
★ You are viewing this record
Sibling
James Hennessy
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Hennessy
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Hennessy
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Hennessy
Sibling · 1940 · age 17
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 — Fayette-County, Pennsylvania
Open full size
1940 US Federal Census — Fayette-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03505-00158)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert Knight | 22 | Head | Laborer | W. Virginia |
| 2 | Ollie Knight | 52 | Mother | — | W. Virginia |
| 3 | Ruth A. Knight | 17 | Sister | — | Pennsylvania |
| 4 | Helen Knight | 12 | Sister | — | Pennsylvania |
| 5 | William Pringle | 32 | Head | Miner | Pennsylvania |
| 6 | Ellen Pringle | 32 | Wife | — | Pennsylvania |
| 7 | Ruth Pringle | 12 | Daughter | — | Pennsylvania |
| 8 | William Pringle | 10 | Son | — | Pennsylvania |
| 9 | Georgia A. Pringle | 8 | Daughter | — | Pennsylvania |
| 10 | Charles Pringle | 5 | Son | — | Pennsylvania |
| 11 | Kenneth Pringle | 2 | Son | — | Pennsylvania |
| 12 | Gerald Torrence | 39 | Head | Miner | Pennsylvania |
| 13 | Lloyd Torrence | 37 | Brother | Laborer | Pennsylvania |
| 14 | Jennie Heanty | Hearty | 62 | Head | Teacher | Pennsylvania |
| 15 | Peter Heanty | Hearty | 87 | Father | — | Ireland |
| 16 | Bruce Pringle | 53 | Head | — | Pennsylvania |
| 17 | Ida Pringle | 43 | Wife | — | Pennsylvania |
| 18 | Harold Pringle | 36 | Son | Salesman | Pennsylvania |
| 19 | Romaine Pringle | 16 | Daughter | — | Pennsylvania |
| 20 | Alice Pringle | 10 | Daughter | — | Pennsylvania |
| 21 | Fred Youn | 53 | Head | Farmer | Pennsylvania |
| 22 | Emelia Youn | 55 | Wife | — | Sweden |
| 23 | Sanford Lint | 52 | Head | Laborer | Pennsylvania |
| 24 | Marion Lint | 19 | Daughter | — | Pennsylvania |
| 25 | Lester Lint | 16 | Son | New Worker | Pennsylvania |
| 26 | George Hennessy | 54 | Head | Coal Miner | Pennsylvania |
| 27 | Margaret Hennessy | 40 | Wife | — | Pennsylvania |
| 28 | William Hennessy | 24 | Son | New Worker | Pennsylvania |
| 29 | Harold Hennessy | 17 | Son | New Worker | Pennsylvania |
| 30 | Thomas Hennessy | 16 | Son | New Worker | Pennsylvania |
| 31 | Mary E. Hennessy THIS PERSON | 15 | Daughter | — | Pennsylvania |
| 32 | James H. Hennessy | 13 | Son | — | Pennsylvania |
| 33 | Ellis Murtland | 60 | Head | Laborer | Pennsylvania |
| 34 | Goldie Murtland | 37 | Wife | — | Pennsylvania |
| 35 | Joseph Oburnier | 41 | Head | Miner | Pennsylvania |
| 36 | Ruby Oburnier | 28 | Wife | — | Pennsylvania |
| 37 | Raymond Hall | 19 | Brother-in-law | Miner | Pennsylvania |
| 38 | Mike Marko | 57 | Head | Farmer | Austria |
| 39 | Anna Marko | 46 | Wife | — | Austria |
| 40 | Charles Marko | 24 | Son | Laborer | Pennsylvania |
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)