JM
James Mahoney — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this James Mahoney across the 1900, 1910 and 1920 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1880), then head of a 6-person household.
Age 40
b. ~1880
Male
Head
Born: Ireland
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Middlesex, Massachusetts |
| Surname | Mahoney |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1895 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Moulder |
| Industry | Machine Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Ireland |
| Year of Naturalization | 1909 |
| Birthplace (normalized) | ireland |
| Occupation | Moulder |
| Township / Ward | Wakefield Town |
| Est. Birth Year | ~1880 |
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 1920 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Mary Sullivan | Other | — | 30 | ~1890 |
| Catherine Mahoney | Daughter | — | 9 | ~1911 |
| Margaret Mahoney | Spouse | — | 38 | ~1882 |
| Jeremiah Sullivan | Other | — | 42 | ~1878 |
| James Mahoney | Head | — | 40 | ~1880 |
| Margaret Mahoney | Daughter | — | 2 | ~1918 |
Census Appearances
1900
Middlesex, Massachusetts
Other, age 24
Middlesex, Massachusetts · implied b. ~1876 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | James |
| Relationship to Head | Inmate |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Ireland |
| Birth Month | May |
| Birth Year | 1876 |
| Year of Immigration | 1890 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Fisherman |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
Middlesex, Massachusetts
Head, age 32
Middlesex, Massachusetts · implied b. ~1878 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 0 |
| Year of Immigration | 1895 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Moulder |
| Industry | Iron Foundry |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Middlesex, Massachusetts
Head, age 40
Middlesex, Massachusetts · implied b. ~1880 — 6 household members
| Surname | Mahoney |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1895 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Moulder |
| Industry | Machine Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth Country | Ireland |
| Year of Naturalization | 1909 |
| 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 3 US Census years (1900, 1910 and 1920) in Middlesex, Massachusetts, using XGBoost record linkage.
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This person
Anchor record
James Mahoney
Head · 1920 · age 40 · b. ~1880 · Massachusetts
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Middlesex, Massachusetts
Open full size
1920 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu716unit:0538)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Maurice E. Coteau | 21 | Boarder | Buttons | Canada |
| 2 | Stanley Whalen | 27 | Head | Bleacher | Lithuania |
| 3 | Julia Whalen | 22 | Wife | — | Massachusetts |
| 4 | Catherine A. Whalen | 2 | Daughter | — | Massachusetts |
| 5 | William H. Bennett | 55 | Head | Foreman | Massachusetts |
| 6 | Susan A. Bennett | 52 | Wife | Stitcher | Michigan |
| 7 | Ellen T. Hennessey | 50 | Head | Housework | Ireland |
| 8 | William F. Hennessey | 25 | Son | Laborer | Massachusetts |
| 9 | Frank Hennessey | 22 | Son | Demonstrator | Massachusetts |
| 10 | Cornelius Shanahan | 28 | Head | Conductor | Ireland |
| 11 | Margaret Shanahan | 28 | Wife | — | Ireland |
| 12 | Catherine Crowley | 32 | Boarder | Stitcher | Ireland |
| 13 | Margaret Crowley | 31 | Boarder | Stitcher | Ireland |
| 14 | Elizabeth Reilly | 40 | Head | Presser | Canada |
| 15 | James R. Reilly | 11 | Son | — | Massachusetts |
| 16 | Mary M. Reilly | 7 | Daughter | — | Massachusetts |
| 17 | Julia Manley | 40 | Head | Stitcher | Canada |
| 18 | James Mahoney THIS PERSON | 40 | Head | Moulder | Ireland |
| 19 | Margaret Mahoney | 38 | Wife | — | Ireland |
| 20 | Catherine Mahoney | 9 | Daughter | — | Massachusetts |
| 21 | Margaret T. Mahoney | 2 | Daughter | — | Massachusetts |
| 22 | Mary C. Sullivan | 30 | Boarder | Presser | Ireland |
| 23 | Jeremiah Sullivan | 42 | Boarder | Laborer | Ireland |
| 24 | Patrick Leonard | 55 | Head | Meter Reader | Ireland |
| 25 | Margaret Leonard | 20 | Daughter | Stenographer | Massachusetts |
| 26 | Joseph Leonard | 18 | Son | Stenographer | Massachusetts |
| 27 | Margaret Leonard | 87 | Mother | — | Ireland |
| 28 | Humphrey Collins | 41 | Head | Motorman | Ireland |
| 29 | Catherine Collins | 41 | Wife | — | Ireland |
| 30 | Annie M. Collins | 13 | Daughter | — | Massachusetts |
| 31 | Catherine F. Collins | 1 | Daughter | — | Massachusetts |
| 32 | Thomas C. Walsh | 62 | Head | Mason | Ireland |
| 33 | Catherine Walsh | 63 | Wife | — | Ireland |
| 34 | Thomas J. Walsh | 26 | Son | Mason | Massachusetts |
| 35 | William J. Walsh | 18 | Son | Signal Painter | Massachusetts |
| 36 | Mary Griffin | 23 | Niece | Folder | Massachusetts |
| 37 | Charles S. Waitt | 48 | Head | Electrician | Massachusetts |
| 38 | Maude F. Waitt | 42 | Wife | — | Canada |
| 39 | Mildred S. Waitt | 18 | Daughter | Shoe Maker | Massachusetts |
| 40 | Edward S. Waitt | 16 | Son | Mail Clerk | Massachusetts |
| 41 | Jennie F. Waitt | 11 | Daughter | — | Massachusetts |
| 42 | Dorothy E. Waitt | 11 | Daughter | — | Massachusetts |
| 43 | Elmer R. Waitt | 7 | Son | — | Massachusetts |
| 44 | Albert J. Waitt | 5 | Son | — | Massachusetts |
| 45 | Edna M. Waitt | 3 | Daughter | — | Massachusetts |
| 46 | Florence E. Waitt | 1 | Daughter | — | Massachusetts |
| 47 | Teresa Bickell | 65 | Head | Nurse | England |
| 48 | Albert Doucette | 29 | Head | Tender | Canada |
| 49 | Mary E. Doucette | 39 | Wife | — | Canada |
| 50 | Paul J. Doucette | 15 | Son | — | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)