MH
Mary Hennessy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Hampden, Massachusetts
Our Model Tree links this Mary Hennessy across the 1930 and 1940 US Censuses in Hampden, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 11-person household.
Age 13
b. ~1917
Female
Daughter
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Hampden, Massachusetts |
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Holyoke City |
| Est. Birth Year | ~1917 |
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.
11 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Cornelius Hennessy | Head | — | 48 | ~1882 |
| Mary Hennessy | Daughter | — | 13 | ~1917 |
| Cornelius Hennessy | Son | — | 15 | ~1915 |
| Timothy Hennessy | Son | — | 10 | ~1920 |
| Thomas Hennessy | Son | — | 17 | ~1913 |
| Nellie Hennessy | Other | — | 46 | ~1884 |
| William Hennessy | Son | — | 19 | ~1911 |
| Helen Hennessy | Daughter | — | 16 | ~1914 |
| Elizabeth Hennessy | Daughter | — | 12 | ~1918 |
| Maurice Hennessy | Other | — | 51 | ~1879 |
| Patrick Hickson | Other | — | 70 | ~1860 |
Census Appearances
1930
Hampden, Massachusetts
Daughter, age 13
Hampden, Massachusetts · implied b. ~1917 — 11 household members
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Hampden-County, Massachusetts
Daughter, age 24
Hampden-County, Massachusetts · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessey |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Springfield |
| 1935 Residence (County) | Hampden |
| Occupation | New Worker |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 · 1930 · age 13 · b. ~1917 · Massachusetts
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Sibling
Cornelius Hennessy
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Hennessy
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Hennessy
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Hennessy
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Timothy Hennessy
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Hennessy
Sibling · 1930 · age 16
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
1930 US Federal Census — Hampden, Massachusetts
Open full size
1930 US Federal Census — Hampden, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel906:0461)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Nathan Smith | 38 | Head | Cobbler | Lithuania |
| 2 | Mildred Smith | 35 | Wife-H | None | Poland |
| 3 | Robert Smith | 11 | Son | None | Massachusetts |
| 4 | Thomas Bond | 56 | Head | Card-Tender | England |
| 5 | Betsy A. Bond | 56 | Wife-H | None | England |
| 6 | Helen Shaw | 36 | Daughter | Card-Tender | England |
| 7 | James Shaw | 36 | Son-in-law | Comber | England |
| 8 | Leslie Shaw | 10 | Grandson | None | Massachusetts |
| 9 | Nicholas Burger | 54 | Head | Painter | Germany |
| 10 | Margaret Burger | 50 | Wife-H | None | Irish Free State |
| 11 | Edwin Burger | 15 | Son | None | Massachusetts |
| 12 | Margaret Burger | 11 | Daughter | None | Massachusetts |
| 13 | William Helliwell | 40 | Head | Stationary Fireman | England |
| 14 | Jane Helliwell | 38 | Wife-H | None | England |
| 15 | Benson Helliwell | 18 | Son | Finisher | England |
| 16 | Herbert Helliwell | 17 | Son | Finisher | England |
| 17 | Walter Helliwell | 14 | Son | None | Massachusetts |
| 18 | William Helliwell | 12 | Son | None | Massachusetts |
| 19 | Edna L. Helliwell | 10 | Daughter | None | Massachusetts |
| 20 | Thomas O'Connor | 44 | Head | Patrol-Man | Irish Free State |
| 21 | Mary O'Connor | 38 | Wife-H | None | Irish Free State |
| 22 | Thomas Jr. O'Connor | 15 | Son | None | Irish Free State |
| 23 | Thomas Jr. O'Connor | 12 | Son | None | Massachusetts |
| 24 | Mary O'Connor | 9 | Daughter | None | Massachusetts |
| 25 | Helen O'Connor | 0 | Daughter | None | Massachusetts |
| 26 | William J. Delaney | 60 | Head | Machine Repairer | Irish Free State |
| 27 | Agnes Delaney | 26 | Daughter | Winder | Irish Free State |
| 28 | Cornelius J. Hennessy | 48 | Head | Blacksmith | Irish Free State |
| 29 | Nellie Hennessy | 46 | Wife-H | None | Irish Free State |
| 30 | William Hennessy | 19 | Son | Stock Clerk | Massachusetts |
| 31 | Thomas Hennessy | 17 | Son | None | Massachusetts |
| 32 | Helen Hennessy | 16 | Daughter | None | Massachusetts |
| 33 | Cornelius Hennessy | 15 | Son | None | Massachusetts |
| 34 | Mary Hennessy THIS PERSON | 13 | Daughter | None | Massachusetts |
| 35 | Elizabeth Hennessy | 12 | Daughter | None | Massachusetts |
| 36 | Timothy Hennessy | 10 | Son | None | Massachusetts |
| 37 | Patrick Hickson | 70 | Boarder | None | Irish Free State |
| 38 | Maurice Hennessy | 51 | Boarder | Chemical Engineer | Irish Free State |
| 39 | John J. Reidy | 50 | Head | Stationary Fireman | Irish Free State |
| 40 | Annie N. Reidy | 52 | Wife-H | None | Irish Free State |
| 41 | Marie C. Reidy | 20 | Daughter | Stenographer | Massachusetts |
| 42 | Irene Reidy | 18 | Daughter | Box-Maker | Massachusetts |
| 43 | Catherine Reidy | 17 | Daughter | Stenographer | Massachusetts |
| 44 | Helen Reidy | 16 | Daughter | None | Massachusetts |
| 45 | Genevieve Reidy | 14 | Daughter | None | Massachusetts |
| 46 | Patrick J. Neilson | 40 | Head | Stationary Fireman | Irish Free State |
| 47 | Catherine Neilson | 42 | Wife-H | None | Irish Free State |
| 48 | Thomas J. Neilson | 14 | Son | None | Massachusetts |
| 49 | Joseph Neilson | 12 | Son | None | Massachusetts |
| 50 | Helen Neilson | 10 | Daughter | None | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)