MH
Mary Hennessey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Hennessey across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1886), then head of a 9-person household.
Age 54
b. ~1886
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Hennessey |
| Given Name | Mary H. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Woburn City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Woburn City |
| Est. Birth Year | ~1886 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Hennessey | Spouse | — | 54 | ~1886 |
| Robert Hennessey | Son | — | 18 | ~1922 |
| James Hennessey | Son | — | 23 | ~1917 |
| Lucille Hennessey | Daughter | — | 20 | ~1920 |
| Thomas Hennessey | Son | — | 24 | ~1916 |
| Mary Hennessey | Daughter | — | 21 | ~1919 |
| Patricia Hennessey | Daughter | — | 14 | ~1926 |
| Michael Hennessey | Head | — | 57 | ~1883 |
| Barbara Hennessey | Daughter | — | 16 | ~1924 |
Census Appearances
1930
Middlesex, Massachusetts
Other, age 44
Middlesex, Massachusetts · implied b. ~1886 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hennessy |
| Given Name | Mary E. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 24 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Spouse, age 54
Middlesex-County, Massachusetts · implied b. ~1886 — 9 household members
| Surname | Hennessey |
| Given Name | Mary H. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Woburn City |
| 1935 Residence (County) | Middlesex |
| Class of Worker | 0 |
| Highest Grade | H-2 |
| 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 Hennessey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Hennessey
Spouse · 1940 · age 54 · b. ~1886 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01622-00734)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Meagher | 63 | Head | — | Massachusetts |
| 2 | Josephine Meagher | 34 | Daughter | Teacher | Massachusetts |
| 3 | William Meagher | 32 | Son | Truck Driver | Massachusetts |
| 4 | Mary Meagher | 27 | Daughter | Nurse | Massachusetts |
| 5 | Beatrice Meagher | 25 | Daughter | New Worker | Massachusetts |
| 6 | Frank Davie | 34 | Head | Electrician | England |
| 7 | Kathleen Davie | 32 | Wife | — | England |
| 8 | Francis Davie | 9 | Son | — | Massachusetts |
| 9 | John Davie | 7 | Son | — | Massachusetts |
| 10 | Joseph Davie | 5 | Son | — | Massachusetts |
| 11 | Kathleen Davie | 2 | Daughter | — | Massachusetts |
| 12 | John Kelley | 67 | Head | Truck Driver | Massachusetts |
| 13 | Mary Kelley | 60 | Wife | — | Massachusetts |
| 14 | Esther Kelley | 34 | Daughter | Teacher | Massachusetts |
| 15 | Walter Kelley | 29 | Son | Manager | Massachusetts |
| 16 | Francis Kelley | 20 | Son | Gear Cutter | Massachusetts |
| 17 | Daniel Kelley | 16 | Son | — | Massachusetts |
| 18 | Frank Hayden | 49 | Head | Real Estate Clerk | Illinois |
| 19 | Freda Hayden | 46 | Wife | — | Sweden |
| 20 | Lillian Hayden | 19 | Daughter | — | Massachusetts |
| 21 | Frank Jr. Hayden | 16 | Son | — | Massachusetts |
| 22 | George Hayden | 11 | Son | — | Massachusetts |
| 23 | Richard Davis | 37 | Head | Clerk | Maine |
| 24 | Lila Davis | 33 | Wife | — | Massachusetts |
| 25 | Jeanne Davis | 12 | Daughter | — | Massachusetts |
| 26 | Ida Carlberg | 56 | Mother-in-law | — | Sweden |
| 27 | Margaret Donahue | 62 | Head | — | England |
| 28 | Michael J. Hennessey | 57 | Head | Salesman | Massachusetts |
| 29 | Mary H. Hennessey THIS PERSON | 54 | Wife | — | Massachusetts |
| 30 | Thomas Hennessey | 24 | Son | New Worker | Massachusetts |
| 31 | James G. Hennessey | 23 | Son | Clerk | Massachusetts |
| 32 | Mary B. Hennessey | 21 | Daughter | New Worker | Massachusetts |
| 33 | Lucille H. Hennessey | 20 | Daughter | Stenographer | Massachusetts |
| 34 | Robert Hennessey | 18 | Son | — | Massachusetts |
| 35 | Barbara H. Hennessey | 16 | Daughter | — | Massachusetts |
| 36 | Patricia M. Hennessey | 14 | Daughter | — | Massachusetts |
| 37 | Roger Lohnes | 34 | Head | Salesman | Nova Scotia |
| 38 | Florence Lohnes | 39 | Wife | — | Nova Scotia |
| 39 | Gerald Lohnes | 11 | Son | — | Massachusetts |
| 40 | George L. Brown | 52 | Head | Tacker | Massachusetts |
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)