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John Mahoney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Mahoney across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1883), then head of a 6-person household.
Age 57
b. ~1883
Male
Head
Born: Mass
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Mahoney |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Widowed |
| Birthplace | Mass |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Fish Cutter |
| Industry | Fish Industry |
| Class of Worker | PW |
| Hours Worked | 66 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
| Occupation | Fish Cutter |
| Township / Ward | Boston City |
| Est. Birth Year | ~1883 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Mahoney | Daughter | — | 22 | ~1918 |
| Margaret Mahoney | Daughter | — | 20 | ~1920 |
| Anne Mahoney | Daughter | — | 20 | ~1920 |
| Catherine Mahoney | Daughter | — | 18 | ~1922 |
| John Mahoney | Head | — | 57 | ~1883 |
| Catherine Mahoney | Other | — | 52 | ~1888 |
Census Appearances
1920
Suffolk, Massachusetts
Head, age 41
Suffolk, Massachusetts · implied b. ~1879 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | John M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Mass |
| Father's Birthplace | Mass |
| Mother's Birthplace | Mass |
| Occupation | Foreman |
| Industry | Teamster |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
1930
Suffolk, Massachusetts
Head, age 49
Suffolk, Massachusetts · implied b. ~1881 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MAHONEY |
| Given Name | JOHN |
| Relationship to Head | HEAD |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Mass |
| Age at First Marriage | 38 |
| Father's Birthplace | Mass |
| Mother's Birthplace | Mass |
| Occupation | Teamster |
| Industry | City Gov't |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | $3000 |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
1940
Suffolk-County, Massachusetts
Head, age 57
Suffolk-County, Massachusetts · implied b. ~1883 — 6 household members
| Surname | Mahoney |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Widowed |
| Birthplace | Mass |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Occupation | Fish Cutter |
| Industry | Fish Industry |
| Class of Worker | PW |
| Hours Worked | 66 |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | mass |
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 John Mahoney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Mahoney
Head · 1940 · age 57 · b. ~1883 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01674-00664)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert Casey | 3 | Son | — | Mass |
| 2 | Carroll Ann Casey | 2 | Daughter | — | Mass |
| 3 | Michael Mcdonnell | 50 | Head | Bartender | Ireland |
| 4 | Mary Mcdonnell | 47 | Wife | — | Ireland |
| 5 | John Mcdonnell | 27 | Son | Machinist | Mass |
| 6 | William Mcdonnell | 25 | Son | Chauffeur | Mass |
| 7 | Joseph Mcdonnell | 21 | Son | — | Mass |
| 8 | Eileen Mcdonnell | 18 | Daughter | — | Mass |
| 9 | John Mahoney THIS PERSON | 57 | Head | Fish Cutter | Mass |
| 10 | Mary Mahoney | 22 | Daughter | Administrator | Mass |
| 11 | Margaret Mahoney | 20 | Daughter | Floor Girl | Mass |
| 12 | Anne Mahoney | 20 | Daughter | Attendant | Mass |
| 13 | Catherine Mahoney | 18 | Daughter | Clerical | Mass |
| 14 | Catherine Mahoney | 52 | Sister | — | Mass |
| 15 | Hugh Kelley | 58 | Head | — | Mass |
| 16 | Mary Kelley | 50 | Wife | — | Mass |
| 17 | John Bergstrom | 50 | Head | Pressman | Mass |
| 18 | Edward Bergstrom | 20 | Son | Clerk | Mass |
| 19 | John Dunn | 43 | Head | Laborer | Mass |
| 20 | Patricia Dunn | 10 | Daughter | — | Mass |
| 21 | Joseph Nash | 67 | Boarder | Timekeeper | Mass |
| 22 | Abel Bitalho | 33 | Head | Upholsterer | Portugal |
| 23 | Catherine Bitalho | 30 | Wife | — | Mass |
| 24 | Frank Gallant | 63 | Head | Fish Cutter | Portugal |
| 25 | Grace Gallant | 47 | Wife | — | Portugal |
| 26 | Desmond Gallant | 27 | Son | Laborer | Mass |
| 27 | George Gallant | 25 | Son | Clerk | Mass |
| 28 | Extra Line | None | — | — | — |
| 29 | Frederick Godfrey | 60 | Head | Piano | Mass |
| 30 | Virginia Godfrey | 50 | Wife | — | Mass |
| 31 | Israel Kornetsky | 49 | Head | Machinist | Russia |
| 32 | Eva Kornetsky | 42 | Wife | — | Russia |
| 33 | Robert Cochrane | 82 | Head | — | England |
| 34 | Agnes Horan | 50 | Head | — | Mass |
| 35 | Mary Horan | 15 | Daughter | — | Mass |
| 36 | Margaret Horan | 13 | Daughter | — | Mass |
| 37 | Daniel Cahill | 55 | Head | Clerk | Mass |
| 38 | Helen P. Cahill | 48 | Wife | — | Mass |
| 39 | Marion Cahill | 17 | Daughter | Housekeeper | Mass |
| 40 | Ethel Cahill | 11 | Daughter | — | Mass |
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)