MH
Mary Hennessy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Suffolk, Massachusetts
Our Model Tree links this Mary Hennessy across the 1930 and 1940 US Censuses in Suffolk, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1891), then head of a 11-person household.
Age 39
b. ~1891
Female
Spouse
Born: New Jersey
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Suffolk, Massachusetts |
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 17 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Additional Details | |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Boston City |
| Est. Birth Year | ~1891 |
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 |
|---|---|---|---|---|
| James Hennessy | Son | — | 6 | ~1924 |
| Frances Hennessy | Daughter | — | 21 | ~1909 |
| Mary Hennessy | Spouse | — | 39 | ~1891 |
| Alice Hennessy | Daughter | — | 19 | ~1911 |
| Lawrence Hennessy | Son | — | 12 | ~1918 |
| Katherine Hennessy | Daughter | — | 5 | ~1925 |
| Thomas Hennessy | Son | — | 7 | ~1923 |
| John Hennessy | Son | — | 14 | ~1916 |
| John Hennessy | Head | — | 49 | ~1881 |
| Alice Hennessy | Daughter | — | 17 | ~1913 |
| Julia Hennessy | Daughter | — | 12 | ~1918 |
Census Appearances
1930
Suffolk, Massachusetts
Spouse, age 39
Suffolk, Massachusetts · implied b. ~1891 — 11 household members
| Surname | Hennessy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 17 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
Spouse, age 51
Suffolk-County, Massachusetts · implied b. ~1889 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessey |
| Given Name | Mary F. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Industry | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same house |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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.
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This person
Anchor record
Mary Hennessy
Spouse · 1930 · age 39 · b. ~1891 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Suffolk, Massachusetts
Open full size
1930 US Federal Census — Suffolk, Massachusetts
Page Contents
48 people indexed on this census page (ia:1930:massachusettscensus00reel948:0059)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Thompson | 42 | Head | Machinist | New Hampshire |
| 2 | Rose Thompson | 37 | Wife | — | Massachusetts |
| 3 | Alice Thompson | 17 | Daughter | — | Massachusetts |
| 4 | Albert Thompson | 14 | Son | Runner | Massachusetts |
| 5 | Marie B Thompson | 12 | Daughter | Office Boy | Massachusetts |
| 6 | Florence Thompson | 10 | Daughter | — | Massachusetts |
| 7 | Joseph Thompson | 5 | Son | — | Massachusetts |
| 8 | Ruth N Thompson | 2 | Daughter | — | Massachusetts |
| 9 | Fred Lewis | 32 | Head | — | Canada English |
| 10 | Josephine Lewis | 21 | Wife | — | Canada English |
| 11 | Fred Lewis | 9 | Son | — | Canada English |
| 12 | Audrey Lewis | 6 | Son | — | Massachusetts |
| 13 | Vivian Lewis | 4 | Daughter | — | Massachusetts |
| 14 | Edward Lewis | 2 | Son | — | Massachusetts |
| 15 | John Hennessy | 49 | Head | Steamfitter | Scotland |
| 16 | Mary Hennessy THIS PERSON | 39 | Wife | — | New Jersey |
| 17 | Frances Hennessy | 21 | Daughter | Packer | New Jersey |
| 18 | Alice Hennessy | 19 | Daughter | Stitcher | New Jersey |
| 19 | Alice Hennessy | 17 | Daughter | Marker | Massachusetts |
| 20 | John Hennessy | 14 | Son | — | Massachusetts |
| 21 | Julia Hennessy | 12 | Daughter | — | Massachusetts |
| 22 | Lawrence Hennessy | 12 | Son | — | Massachusetts |
| 23 | Thomas Hennessy | 7 | Son | — | Massachusetts |
| 24 | James Hennessy | 6 | Son | — | Massachusetts |
| 25 | Katherine Hennessy | 5 | Daughter | — | Massachusetts |
| 26 | Fred Chisholm | 23 | Head | Cook | Massachusetts |
| 27 | Helen Chisholm | 25 | Wife | — | England |
| 28 | Walter Chisholm | 5 | Son | — | Rhode Island |
| 29 | Thomas Chisholm | 3 | Son | — | Rhode Island |
| 30 | Patrick Noonan | 75 | Head | None (Retired) | Irish Free State |
| 31 | James Gormley | 41 | Head | Cleaner | Irish Free State |
| 32 | Mary Gormley | 14 | Daughter | — | Massachusetts |
| 33 | John Flynn | 16 | Head | Servant | Massachusetts |
| 34 | William Nixon | 55 | Head | Machinist | Massachusetts |
| 35 | George Major | 76 | Head | None (Retired) | Massachusetts |
| 36 | Esther Major | 60 | Wife | — | Irish Free State |
| 37 | Mary Lixon | 65 | Head | Cleaner | Massachusetts |
| 38 | Lawrence Mugra | 41 | Head | Salesman | Maine |
| 39 | Florence Mugra | 31 | Wife | — | Canada English |
| 40 | Fredrick Mugra | 15 | Son | — | Massachusetts |
| 41 | Willard Mugra | 11 | Son | — | Massachusetts |
| 42 | Alice Mugra | 2 | Daughter | — | Massachusetts |
| 43 | James Leonard | 60 | Head | Porter | Massachusetts |
| 44 | Mabel Leonard | 40 | Wife | — | New Jersey |
| 45 | Joseph Leonard | 13 | Son | — | Massachusetts |
| 46 | Mary Leonard | 11 | Daughter | — | Massachusetts |
| 47 | Katherine Leonard | 9 | Daughter | — | Massachusetts |
| 48 | James Leonard | 5 | Son | — | Massachusetts |
Related Census Records
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)