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Mary Mahoney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hampden-County, Massachusetts
Our Model Tree links this Mary Mahoney across the 1930 and 1940 US Censuses in Hampden-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1898), then head of a 9-person household.
Age 42
b. ~1898
Female
Spouse
Born: Michigan
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Hampden-County, Massachusetts |
| Surname | Mahoney |
| Given Name | Mary J. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Chicopee |
| 1935 Residence (County) | Hampden |
| Additional Details | |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Chicopee |
| Est. Birth Year | ~1898 |
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 |
|---|---|---|---|---|
| Margaret Mahoney | Daughter | — | 17 | ~1923 |
| Barbara Mahoney | Daughter | — | 8 | ~1932 |
| Joan Mahoney | Daughter | — | 3 | ~1937 |
| Ester Mahoney | Daughter | — | 5 | ~1935 |
| Mary Mahoney | Daughter | — | 12 | ~1928 |
| Roy Mahoney | Head | — | 43 | ~1897 |
| John Mahoney | Son | — | 2 | ~1938 |
| Roy Mahoney | Son | — | 9 | ~1931 |
| Mary Mahoney | Spouse | — | 42 | ~1898 |
Census Appearances
1930
Hampden, Massachusetts
Spouse, age 32
Hampden, Massachusetts · implied b. ~1898 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | Mary C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Michigan |
| Age at First Marriage | 23 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Hampden-County, Massachusetts
Spouse, age 42
Hampden-County, Massachusetts · implied b. ~1898 — 9 household members
| Surname | Mahoney |
| Given Name | Mary J. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Michigan |
| 1935 Residence (City) | Chicopee |
| 1935 Residence (County) | Hampden |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Mahoney across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mahoney
Spouse · 1940 · age 42 · b. ~1898 · 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 — Hampden-County, Massachusetts
Open full size
1940 US Federal Census — Hampden-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01594-00164)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Roy B. Mahoney | 43 | Head | Medical Doctor | Massachusetts |
| 2 | Mary J. Mahoney THIS PERSON | 42 | Wife | — | Michigan |
| 3 | Margaret Mahoney | 17 | Daughter | — | Illinois |
| 4 | Mary J. Mahoney | 12 | Daughter | — | Massachusetts |
| 5 | Roy B. Mahoney | 9 | Son | — | Massachusetts |
| 6 | Barbara Mahoney | 8 | Daughter | — | Massachusetts |
| 7 | Ester Mahoney | 5 | Daughter | — | Massachusetts |
| 8 | Joan Mahoney | 3 | Daughter | — | Massachusetts |
| 9 | John Mahoney | 2 | Son | — | Massachusetts |
| 10 | Joseph St. Mary | 66 | Head | — | New York |
| 11 | Clarinda St. Mary | 63 | Wife | — | Massachusetts |
| 12 | Paul St. Mary | 30 | Son | Rocket Stringer | Massachusetts |
| 13 | Lester St. Mary | 27 | Son | Machinist | Massachusetts |
| 14 | Secretary Rose A. St. Mary | 63 | Lodger | — | Massachusetts |
| 15 | Patrick Kerr | 45 | Head | Steel Hardener | Irish Free State |
| 16 | Catherine Kerr | 45 | Wife | — | Scotland |
| 17 | Margaret Kerr | 23 | Daughter | Chiropractor | Scotland |
| 18 | Catherine Kerr | 19 | Daughter | File Clerk | Massachusetts |
| 19 | Haugel Mabel Kerr | 25 | Lodger | Welder | Massachusetts |
| 20 | Agnes Gloster | 67 | Head | — | Massachusetts |
| 21 | Manning Nellie Gloster | 72 | Sister | — | Massachusetts |
| 22 | Yvonne Tetrault | 52 | Head | — | Canada French |
| 23 | Grannette Tetrault | 23 | Daughter | File Clerk | Massachusetts |
| 24 | Irene Tetrault | 21 | Daughter | Winder | Massachusetts |
| 25 | Charlotte Tetrault | 16 | Daughter | — | Massachusetts |
| 26 | William St. Jean | 71 | Head | — | Massachusetts |
| 27 | Daniel Boudet | 22 | Head | Weaver | Maine |
| 28 | Eleanor Boudet | 26 | Wife | — | New Hampshire |
| 29 | David Boudet | 3 | Son | — | Maine |
| 30 | Rene Poulin | 28 | Lodger | Weaver | Canada French |
| 31 | Henrianna St. Jean | 68 | Head | — | Canada French |
| 32 | Perry Emma St. Jean | 67 | Lodger | — | Connecticut |
| 33 | Emile Coulombe | 32 | Head | Press Operator | New Hampshire |
| 34 | Leimne Coulombe | 28 | Wife | — | Massachusetts |
| 35 | Claire Coulombe | 3 | Daughter | — | Massachusetts |
| 36 | Isaac Gelinas | 47 | Head | Civil Engineer | Massachusetts |
| 37 | Flora Gelinas | 46 | Wife | — | Massachusetts |
| 38 | Felix Nadeau | 71 | Head | Janitor | Massachusetts |
| 39 | Raymond Nadeau | 38 | Son | Machinist | Massachusetts |
| 40 | Joseph Gelinas | 33 | Head | Proprietor | Canada French |
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)