JM
James Mahoney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Worcester-County, Massachusetts
Our Model Tree links this James Mahoney across the 1930 and 1940 US Censuses in Worcester-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1861), then head of a 11-person household.
Age 79
b. ~1861
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Worcester-County, Massachusetts |
| Surname | Mahoney |
| Given Name | James J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 79 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Millville |
| 1935 Residence (County) | Worcester |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 0 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Millville |
| Est. Birth Year | ~1861 |
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 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Theresa Mahoney | Daughter | — | 9 | ~1931 |
| Anna Mahoney | Daughter | — | 4 | ~1936 |
| Daniel Mahoney | Son | — | 15 | ~1925 |
| James Mahoney | Head | — | 79 | ~1861 |
| Katherine Mahoney | Spouse | — | 42 | ~1898 |
| Gunnar Brodd | Son | — | 36 | ~1904 |
| Eleanor Mahoney | Daughter | — | 19 | ~1921 |
| Catherine Mahoney | Daughter | — | 21 | ~1919 |
| Carl Brodd | Son | — | 29 | ~1911 |
| Harold Brodd | Son | — | 16 | ~1924 |
| Hilda Brodd | Spouse | — | 57 | ~1883 |
Census Appearances
1930
Worcester, Massachusetts
Head, age 70
Worcester, Massachusetts · implied b. ~1860 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | James E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1879 |
| Age at First Marriage | 30 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Watchman |
| Industry | Rubber Shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 8000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Worcester-County, Massachusetts
Head, age 79
Worcester-County, Massachusetts · implied b. ~1861 — 11 household members
| Surname | Mahoney |
| Given Name | James J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 79 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Millville |
| 1935 Residence (County) | Worcester |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | 0 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 James Mahoney across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Mahoney
Head · 1940 · age 79 · b. ~1861 · 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 — Worcester-County, Massachusetts
Open full size
1940 US Federal Census — Worcester-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01652-00793)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thelma Eastman | 20 | Daughter | Drawing | Massachusetts |
| 42 | Harold E. Eastman | 18 | Son | Labor | Massachusetts |
| 43 | Kenneth C. Eastman | 16 | Son | — | Massachusetts |
| 44 | Carl H. Eastman | 10 | Son | — | Massachusetts |
| 45 | William Uzik | 58 | Head | Labor | Lithuania |
| 46 | Carrie Uzik | 55 | Wife | — | Poland |
| 47 | Billy Uzik | 33 | Son | — | Massachusetts |
| 48 | Joseph Uzik | 24 | Son | Labor | Massachusetts |
| 49 | Benjamin Uzik | 19 | Son | — | Massachusetts |
| 50 | James J. Mahoney THIS PERSON | 79 | Head | — | Ireland |
| 51 | Katherine Mahoney | 42 | Wife | — | Massachusetts |
| 52 | Catherine Mahoney | 21 | Daughter | — | Massachusetts |
| 53 | Eleanor Mahoney | 19 | Daughter | Timekeeper | Massachusetts |
| 54 | Daniel Mahoney | 15 | Son | — | Massachusetts |
| 55 | Theresa Mahoney | 9 | Daughter | — | Massachusetts |
| 56 | Anna Mahoney | 4 | Daughter | — | Massachusetts |
| 57 | Hilda Brodd | 57 | Wife | — | Finland |
| 58 | Gunnar Brodd | 36 | Son | — | Massachusetts |
| 59 | Carl Brodd | 29 | Son | Labor | Massachusetts |
| 60 | Harold Brodd | 16 | Son | Piecer | Massachusetts |
| 61 | Maurice Heldenbergh | 27 | Head | Twister | France |
| 62 | Sally Heldenbergh | 20 | Wife | — | Massachusetts |
| 63 | Maurice Jr. Heldenbergh | 2 | Son | — | Rhode Island |
| 64 | Constantin Kiseloff | 47 | Head | Propr | Russia |
| 65 | Elemia Kiseloff | 43 | Wife | — | Russia |
| 66 | Caroline Hones | 46 | Wife | — | Poland |
| 67 | Alec Hones | 23 | Son | Labor | Massachusetts |
| 68 | Sophie Hones | 19 | Daughter | Sewing | Massachusetts |
| 69 | John Monoschely | 33 | Head | — | Vermont |
| 70 | Evelyn Monoschely | 28 | Wife | — | Massachusetts |
| 71 | Helen J. Monoschely | 7 | Daughter | — | Massachusetts |
| 72 | Sylvester Barnett | 51 | Head | Drawing | Massachusetts |
| 73 | Mary Barnett | 56 | Wife | Labor | Lithuania |
| 74 | William Barnett | 21 | Son | — | Massachusetts |
| 75 | Edla Erickson | 66 | Wife | — | Finland |
| 76 | Arthur Erickson | 37 | Son | Shear Tender | Massachusetts |
| 77 | Lillie Erickson | 31 | Daughter-in-law | Drawing | Michigan |
| 78 | Mary Erickson | 13 | Granddaughter | — | Massachusetts |
| 79 | Shirley-May Erickson | 11 | Granddaughter | — | Massachusetts |
| 80 | Ruth Carlson | 15 | Granddaughter | — | 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)