MH
Mary Hennessy — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Philadelphia, Pennsylvania
Our Model Tree links this Mary Hennessy across the 1920, 1930 and 1940 US Censuses in Philadelphia, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1864), then head of a 3-person household.
Age 56
b. ~1864
Female
Head
Born: Ireland
Widowed
1920 Census Record Details
| Census Year | 1920 |
| Location | Philadelphia, Pennsylvania |
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1882 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth Country | Ireland |
| Year of Naturalization | un |
| Birthplace (normalized) | ireland |
| Township / Ward | City Of Philadelphia |
| Est. Birth Year | ~1864 |
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.
3 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| David Hennessy | Son | — | 21 | ~1899 |
| Mary Hennessy | Head | — | 56 | ~1864 |
| Daniel Hennessy | Son | — | 23 | ~1897 |
Census Appearances
1920
Philadelphia, Pennsylvania
Head, age 56
Philadelphia, Pennsylvania · implied b. ~1864 — 3 household members
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 56 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1882 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth Country | Ireland |
| Year of Naturalization | un |
| Birthplace (normalized) | ireland |
1930
Philadelphia, Pennsylvania
Other, age 66
Philadelphia, Pennsylvania · implied b. ~1864 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessey |
| Given Name | Margaret |
| Relationship to Head | Mother |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Philadelphia-County, Pennsylvania
Other, age 79
Philadelphia-County, Pennsylvania · implied b. ~1861 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessey |
| Given Name | Mary |
| Relationship to Head | Mother |
| Sex | F |
| Color / Race | White |
| Age | 79 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Naturalization Status | Naturalized |
| Highest Grade | 4 |
| 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.
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This person
Anchor record
Mary Hennessy
Head · 1920 · age 56 · b. ~1864 · Pennsylvania
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Philadelphia, Pennsylvania
Open full size
1920 US Federal Census — Philadelphia, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1623unit:0612)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James O Grady | 40 | Head | Machinist | Ireland |
| 2 | Margaret Grady | 43 | Wife | — | Ireland |
| 3 | James F Delaney | 62 | Head | Stone Cutter | Pennsylvania |
| 4 | Catherine Delaney | 56 | Wife | — | Pennsylvania |
| 5 | George Delaney | 24 | son | Pool Table Room | Pennsylvania |
| 6 | James A Jr Delaney | 22 | son | Fireman | Pennsylvania |
| 7 | Thomas Lawler | 44 | brother-in-law | Mill Hand | Pennsylvania |
| 8 | George H Peters | 32 | Head | Machinist | Pennsylvania |
| 9 | Credilla Peters | 29 | Wife | — | Pennsylvania |
| 10 | George H Peters | 3 | son | None | Pennsylvania |
| 11 | Joseph P Mayer | 39 | Head | Clerk | Pennsylvania |
| 12 | Laura A Mayer | 40 | Wife | — | Pennsylvania |
| 13 | Ralph W Mayer | 13 | son | — | Pennsylvania |
| 14 | Mary Hennessy THIS PERSON | 56 | Head | — | Ireland |
| 15 | Daniel Hennessy | 23 | son | Repairman | Pennsylvania |
| 16 | David Hennessy | 21 | son | Manager | Pennsylvania |
| 17 | Charles Ross | 48 | Head | Butcher | Massachusetts |
| 18 | Mary F Ross | 48 | Wife | — | Pennsylvania |
| 19 | Catherine Hyland | 60 | Head | Seamstress | Ireland |
| 20 | Catherine Hyland | 25 | Daughter | Caines Chair | Pennsylvania |
| 21 | Maurice Hyland | 23 | son | Time Keeper | Pennsylvania |
| 22 | Roger Delaney | 53 | Head | Tin Smith | Pennsylvania |
| 23 | Mary Delaney | 49 | Wife | — | Pennsylvania |
| 24 | Ralph J Delaney | 21 | son | Auto Mechanic | Pennsylvania |
| 25 | Henry G Huston | 50 | Head | Manager | Pennsylvania |
| 26 | Catherine Huston | 50 | Wife | — | Pennsylvania |
| 27 | Harry R Huston | 21 | son | Plumber | Pennsylvania |
| 28 | Patrick H Callahan | 47 | Head | Electrician | Ireland |
| 29 | Hannah Callahan | 36 | Wife | — | Ireland |
| 30 | James P Callahan | 18 | son | Electrician | Pennsylvania |
| 31 | John J Callahan | 15 | son | — | Pennsylvania |
| 32 | Mary Callahan | 7 | Daughter | — | Pennsylvania |
| 33 | Thomas M Carney | 59 | Head | Bricklayer | Ireland |
| 34 | Catherine Carney | 52 | Wife | — | England |
| 35 | Winifred Carney | 30 | Daughter | Mender | Pennsylvania |
| 36 | Thomas Jr Carney | 22 | son | Machinist | Pennsylvania |
| 37 | John Carney | 19 | son | Machinist | Pennsylvania |
| 38 | Martin Carney | 17 | son | Delivery Boy | Pennsylvania |
| 39 | Francis Carney | 14 | son | — | Pennsylvania |
| 40 | Mary Murphy | 56 | Head | — | England |
| 41 | Catherine Murphy | 29 | Daughter | Cloth Mender | Pennsylvania |
| 42 | Joseph B Allenby | 57 | Boarder | Plumber | New Jersey |
| 43 | Harry B Allenby | 14 | Boarder | None | Pennsylvania |
| 44 | Walter W Bechett | 24 | Head | Inspector | Pennsylvania |
| 45 | Rosalia Bechett | 48 | Mother | — | Pennsylvania |
| 46 | Arthur H Bleiler | 42 | Head | Letter Carrier | Pennsylvania |
| 47 | Frances M Bleiler | 42 | Wife | None | Ireland |
| 48 | Frances L Bleiler | 20 | Daughter | Operator | Pennsylvania |
| 49 | Mildred L Bleiler | 16 | Daughter | — | Pennsylvania |
| 50 | Edward H Bleiler | 14 | son | — | Pennsylvania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)