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James Mcmahon — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Richmond, New York
Our Model Tree links this James Mcmahon across the 1920, 1930 and 1940 US Censuses in Richmond, New York (XGBoost, ~Confirmed) — first a head (b.~1872), then head of a 3-person household.
Age 58
b. ~1872
Male
Head
Born: Ireland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Richmond, New York |
| Surname | McMahon |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1888 |
| Age at First Marriage | 25 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Labor |
| Industry | R.R. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 3,000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Labor |
| Township / Ward | New York |
| Est. Birth Year | ~1872 |
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.
3 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| James Mcmahon | Head | — | 58 | ~1872 |
| James Mcmahon | Son | — | 21 | ~1909 |
| Mary Mcmahon | Spouse | — | 50 | ~1880 |
Census Appearances
1920
New York, …
Head, age 48
New York, New York · implied b. ~1872 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1888 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Digger |
| Industry | Shipyard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Year of Naturalization | 1894 |
| Birthplace (normalized) | ireland |
1930
Richmond, New …
Head, age 58
Richmond, New York · implied b. ~1872 — 3 household members
| Surname | McMahon |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1888 |
| Age at First Marriage | 25 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Labor |
| Industry | R.R. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 3,000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
New-York-County, New …
Other, age 63
New-York-County, New York · implied b. ~1877 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | James |
| Relationship to Head | Lodger |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Single |
| Birthplace | Ireland |
| 1935 Residence (City) | Orange |
| Naturalization Status | Naturalized |
| Occupation | Clerk |
| Industry | Transportation |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 1400 |
| Highest Grade | No 5 |
| 1935 Residence | New Jersey |
| 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 Mcmahon across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
James Mcmahon
Head · 1930 · age 58 · b. ~1872 · New York
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Richmond, New York
Open full size
1930 US Federal Census — Richmond, New York
Page Contents
50 people indexed on this census page (ia:1930:newyorkcensus00reel1614:1020)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ellen Rogers | 86 | Head | None | Detroit |
| 2 | James Mcmahon THIS PERSON | 58 | Head | Labor | Ireland |
| 3 | Mary Mcmahon | 50 | Wife | None | New Jersey |
| 4 | James Mcmahon | 21 | Son | None | New York |
| 5 | Domenico Vilella | 37 | Head | Chauffeur | Italy |
| 6 | Angelina Vilella | 37 | Wife | None | Italy |
| 7 | Carmela Vilella | 5 | Daughter | None | New York |
| 8 | Michael Leiso | 30 | Head | Labor | Italy |
| 9 | Elvira Leiso | 28 | Wife | None | New York |
| 10 | Anthony Leiso | 3 | Son | — | New York |
| 11 | Victoria Leiso | 1 | Daughter | — | New York |
| 12 | Giosue Leiso | 60 | Father | Retired | Italy |
| 13 | Vitoria Leiso | 55 | Mother | None | Italy |
| 14 | Alfonzo Santoro | 36 | Head | Labor | Italy |
| 15 | Josephina Santoro | 29 | Wife | None | New York |
| 16 | Minore Falconi | 48 | Head | Janitor | Italy |
| 17 | Teresa Falconi | 39 | Wife | None | New York |
| 18 | August Falconi | 13 | Son | — | New York |
| 19 | Rudolf Falconi | 8 | Son | — | New York |
| 20 | John Falconi | 7 | Son | — | New York |
| 21 | James Falconi | 5 | Son | — | New York |
| 22 | James Mazzella | 26 | Head | Bookkeeper | New York |
| 23 | Mary Mazzella | 20 | Wife | None | New York |
| 24 | Luciano Padovano | 50 | Head | Paper Stock | Italy |
| 25 | Teresa Padovano | 50 | Wife | None | Italy |
| 26 | Concetta Padovano | 20 | Daughter | Clerk | New York |
| 27 | Mary Padovano | 16 | Daughter | None | New York |
| 28 | Johnny Padovano | 9 | Son | — | New York |
| 29 | Maria Prime | 64 | Head | None | Italy |
| 30 | Nicholas Prosia | 41 | Head | Peddler | Italy |
| 31 | Cristina Prosia | 31 | Wife | None | South America |
| 32 | Frances Prosia | 11 | Daughter | — | New York |
| 33 | Rosina Prosia | 10 | Daughter | — | New York |
| 34 | Dominick Prosia | 8 | Son | — | New York |
| 35 | Angelo Prosia | 6 | Son | — | New York |
| 36 | Raffaela Prosia | 5 | Daughter | — | New York |
| 37 | Giuseppe Prosia | 45 | Brother | Peddler | Italy |
| 38 | Raffaela Prosia | 37 | Sister | None | Italy |
| 39 | Francesca Prosia | 68 | Mother | None | Italy |
| 40 | Gaetano Prosia | 31 | Head | Peddler | Italy |
| 41 | Anna Prosia | 23 | Wife | None | Chicago |
| 42 | Frances Prosia | 7 | Daughter | — | New York |
| 43 | Dominick Prosia | 5 | Son | — | New York |
| 44 | Millie Prosia | 2 | Daughter | — | New York |
| 45 | Domenico Prosia | 31 | Head | Tailor | Italy |
| 46 | Filena Prosia | 22 | Wife | None | Italy |
| 47 | Dominick Prosia | 3 | Son | None | New York |
| 48 | Tommaso Prosia | 24 | Brother | Musician | Italy |
| 49 | Antonio Giacovino | 32 | Head | Fireman | Italy |
| 50 | Vincenza Giacovino | 62 | Mother | Paper Box | Italy |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)