MH
Mary Hennessey — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Hennessey across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1889), then head of a 7-person household.
Age 51
b. ~1889
Female
Spouse
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| 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 |
| Additional Details | |
| Industry | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same house |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Township / Ward | Boston City |
| Est. Birth Year | ~1889 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Catherine Hennessey | Daughter | — | 14 | ~1926 |
| Alice Hennessey | Daughter | — | 28 | ~1912 |
| Lawrence Hennessey | Son | — | 20 | ~1920 |
| John Hennessey | Head | — | 61 | ~1879 |
| Mary Hennessey | Spouse | — | 51 | ~1889 |
| James Hennessey | Son | — | 16 | ~1924 |
| Thomas Hennessey | Son | — | 18 | ~1922 |
Census Appearances
Spouse, age 39
Suffolk, Massachusetts · implied b. ~1891 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| 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 |
1940
Suffolk-County, Massachusetts
Spouse, age 51
Suffolk-County, Massachusetts · implied b. ~1889 — 7 household members
| 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 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 51 · b. ~1889 · 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 — Suffolk-County, Massachusetts
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1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01675-00279)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Ulrich | 15 | son | — | Massachusetts |
| 42 | Lenore Ulrich | 13 | daughter | — | Massachusetts |
| 43 | Edward Ulrich | 11 | son | — | Massachusetts |
| 44 | Donald Ulrich | 8 | son | — | Massachusetts |
| 45 | Richard Ulrich | 5 | son | — | Massachusetts |
| 46 | Louise Ulrich | 2 | daughter | — | Massachusetts |
| 47 | Frank M. Pearson | 53 | head | Machine Operator | Massachusetts |
| 48 | Theresa D. Pearson | 53 | wife | — | Massachusetts |
| 49 | Elizabeth Hayes | 58 | head | Factory Worker | Massachusetts |
| 50 | Frances Hayes | 56 | sister | — | Massachusetts |
| 51 | Hannah Kelly | 63 | head | — | Massachusetts |
| 52 | Charles G. Kelly | 33 | son | Machinist | Massachusetts |
| 53 | Mary L. Kelly | 29 | daughter | — | Massachusetts |
| 54 | Helen Norton | 21 | neice | Bookkeeper | Massachusetts |
| 55 | John J. Hennessey | 61 | head | Steamfitter | Scotland |
| 56 | Mary F. Hennessey THIS PERSON | 51 | wife | — | New Jersey |
| 57 | Alice Hennessey | 28 | daughter | Launderess | Massachusetts |
| 58 | Lawrence Hennessey | 20 | son | Laborer | Massachusetts |
| 59 | Thomas Hennessey | 18 | son | Laborer | Massachusetts |
| 60 | James Hennessey | 16 | son | — | Massachusetts |
| 61 | Catherine Hennessey | 14 | daughter | — | Massachusetts |
| 62 | James J. Murray | 84 | head | — | Vermont |
| 63 | Mary E. Murray | 64 | wife | — | Eire |
| 64 | John Davis | 61 | head | Electrician | Wales |
| 65 | Florence Davis | 56 | wife | — | Massachusetts |
| 66 | Doris Sweeney | 25 | daughter | Clerk | Massachusetts |
| 67 | Walter Cantan | 25 | head | Clerk | Massachusetts |
| 68 | Lucille Cantan | 27 | wife | — | Massachusetts |
| 69 | Walter Cantan | 2 | son | — | Massachusetts |
| 70 | Charles W. Murray | 32 | head | Wood Worker | Massachusetts |
| 71 | George F. Murray | 31 | brother | Laborer | Massachusetts |
| 72 | James Murphy | 31 | head | Mechanic | Massachusetts |
| 73 | Edith Murphy | 28 | wife | — | Connecticut |
| 74 | Edith Murphy | 5 | daughter | — | Massachusetts |
| 75 | Elaine Murphy | 3 | daughter | — | Massachusetts |
| 76 | Joseph J. Scarbo | 63 | head | Woodworker | Vermont |
| 77 | Rosilda Scarbo | 55 | wife | — | Massachusetts |
| 78 | Celona Scarbo | 27 | daughter | Seamstress | Massachusetts |
| 79 | Joseph H. Scarbo | 25 | son | Buffer | Massachusetts |
| 80 | Gertrude Scarbo | 23 | daughter | Stenographer | Massachusetts |
Related Census Records
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)