JH
John Hennessey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this John Hennessey across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 8-person household.
Age 12
b. ~1928
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Hennessey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Highest Grade | 6 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1928 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Hennessey | Son | — | 12 | ~1928 |
| John Hennessey | Head | — | 47 | ~1893 |
| Anne Hennessey | Daughter | — | 19 | ~1921 |
| Elizabeth Hennessey | Daughter | — | 17 | ~1923 |
| Joan Hennessey | Daughter | — | 15 | ~1925 |
| Edna Hennessey | Daughter | — | 10 | ~1930 |
| Mary Hennessey | Daughter | — | 21 | ~1919 |
| Marie Hennessey | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Delaware, Pennsylvania
Son, age 1
Delaware, Pennsylvania · implied b. ~1929 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Son, age 12
Philadelphia-County, Pennsylvania · implied b. ~1928 — 8 household members
| Surname | Hennessey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Highest Grade | 6 |
| 1935 Residence | Same house |
| 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 John Hennessey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Hennessey
Son · 1940 · age 12 · b. ~1928 · Pennsylvania
★ You are viewing this record
Sibling
Joan Hennessey
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Hennessey
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Hennessey
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Hennessey
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Hennessey
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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03697-00809)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Viola Werne | 20 | Daughter | — | Pennsylvania |
| 2 | William Martin | 73 | Head | — | Pennsylvania |
| 3 | Estelle V. Martin | 60 | Sister | — | Pennsylvania |
| 4 | William Connell | 37 | Head | Janitor | Pennsylvania |
| 5 | Jeanette Connell | 34 | Wife | — | Pennsylvania |
| 6 | William Jr. Connell | 16 | Son | — | Pennsylvania |
| 7 | Harry Connell | 12 | Son | — | Pennsylvania |
| 8 | George Connell | 10 | Son | — | Pennsylvania |
| 9 | Richard Connell | 9 | Son | — | Pennsylvania |
| 10 | Frank Connell | 7 | Son | — | Pennsylvania |
| 11 | John Kole | 57 | Head | Laborer | Poland |
| 12 | Mary Kole | 56 | Wife | — | Poland |
| 13 | Joseph P. Flaherty | 29 | Head | Laborer | Maine |
| 14 | Helen Flaherty | 30 | Wife | — | Pennsylvania |
| 15 | Charles Flaherty | 8 | Son | — | Pennsylvania |
| 16 | Joan Flaherty | 7 | Daughter | — | Pennsylvania |
| 17 | John Flaherty | 5 | Son | — | Pennsylvania |
| 18 | Arne Olsen | 32 | Head | Seaman | Norway |
| 19 | Margaret Olsen | 27 | Wife | — | Pennsylvania |
| 20 | Richard Olsen | 9 | Son | — | Pennsylvania |
| 21 | Dolores Olsen | 6 | Daughter | — | Pennsylvania |
| 22 | Margaret Olsen | 4 | Daughter | — | Pennsylvania |
| 23 | Robert Olsen | 2 | Son | — | Pennsylvania |
| 24 | George V. Olsen | 0 | Son | — | Pennsylvania |
| 25 | Daisy Berg | 51 | Head | — | Pennsylvania |
| 26 | Raymond Berg | 35 | Son | Laborer | Pennsylvania |
| 27 | Albert Berg | 31 | Son | Laborer | Pennsylvania |
| 28 | John Hennessey | 47 | Head | Fireman | Pennsylvania |
| 29 | Marie Hennessey | 43 | Wife | — | Pennsylvania |
| 30 | Mary Hennessey | 21 | Daughter | New Work | Pennsylvania |
| 31 | Anne Hennessey | 19 | Daughter | New Work | Pennsylvania |
| 32 | Elizabeth Hennessey | 17 | Daughter | — | Pennsylvania |
| 33 | Joan Hennessey | 15 | Daughter | — | Pennsylvania |
| 34 | John Hennessey THIS PERSON | 12 | Son | — | Pennsylvania |
| 35 | Edna Hennessey | 10 | Daughter | — | Pennsylvania |
| 36 | Jules Renson | 26 | Head | Laborer | Pennsylvania |
| 37 | Tillie Renson | 26 | Wife | — | Pennsylvania |
| 38 | Patricia Renson | 5 | Daughter | — | Pennsylvania |
| 39 | Shirley Renson | 3 | Daughter | — | Pennsylvania |
| 40 | — | None | — | — | — |
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)