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James Duffy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · New York, New York
Our Model Tree links this James Duffy across the 1920, 1930 and 1940 US Censuses in New York, New York (XGBoost, ~Confirmed) — first a head (b.~1895), then head of a 6-person household.
Age 35
b. ~1895
Male
Head
Born: Ireland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | New York, New York |
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1911 |
| Age at First Marriage | 30 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Foreman |
| Industry | City Department |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 50.00 |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Foreman |
| Township / Ward | New York City |
| Est. Birth Year | ~1895 |
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 1930 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| T Radermacher | Daughter | — | 8 | ~1922 |
| Margaret Radermacher | Daughter | — | 5 | ~1925 |
| James Duffy | Head | — | 35 | ~1895 |
| Martin Radermacher | Other | — | 36 | ~1894 |
| James Duffy | Son | — | 6 | ~1924 |
| Catherine Duffy | Spouse | — | 33 | ~1897 |
Census Appearances
1920
New York, …
Other, age 27
New York, New York · implied b. ~1893 — 14 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffey |
| Given Name | James |
| Relationship to Head | Roomer |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Year of Immigration | 1910 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Motorman |
| Industry | Street Railway |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1919 |
| Birthplace (normalized) | ireland |
1930
New York, …
Head, age 35
New York, New York · implied b. ~1895 — 6 household members
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1911 |
| Age at First Marriage | 30 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Foreman |
| Industry | City Department |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 50.00 |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
New-York-County, New …
Other, age 46
New-York-County, New York · implied b. ~1894 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | lodger |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | New York |
| Naturalization Status | First papers filed |
| Occupation | Longshoreman |
| Industry | Dock |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 700 |
| Highest Grade | No 7 |
| 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 Duffy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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Anchor record
James Duffy
Head · 1930 · age 35 · b. ~1895 · 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 — New York, New York
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1930 US Federal Census — New York, New York
Page Contents
50 people indexed on this census page (ia:1930:newyorkcensus00reel1579:1081)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Agatha Gomberg | 38 | Head | — | Russia |
| 52 | Sol Gomberg | 4 | Son | — | New York |
| 53 | Irma Frischman | 20 | Sister | Typist | Canada |
| 54 | Aaron Frischman | 2 | Nephew | — | New York |
| 55 | Thomas Fay | 55 | Head | Plumber | New Jersey |
| 56 | Lawrence Fay | 25 | Son | — | Maryland |
| 57 | Marie Fay | 26 | Daughter | Operator | Maryland |
| 58 | James Fay | 20 | Son | Secretary | Maryland |
| 59 | Jerome Fay | 18 | Son | Clerk | West Virginia |
| 60 | Elizabeth Cook | 28 | Daughter | Stenographer | Maryland |
| 61 | Edward Cook | 32 | Son-in-law | — | Virginia |
| 62 | Edith Cook | 2 | Daughter | — | New York |
| 63 | Eddie Smith | 24 | Roomer | — | New Jersey |
| 64 | Anna Duffy | 50 | Head | Finishing Girl | New York |
| 65 | Gertrude Duffy | 14 | Daughter | — | New York |
| 66 | Martha Duffy | 13 | Daughter | — | New York |
| 67 | Anna Duffy | 11 | Daughter | — | New York |
| 68 | Thomas Cassidy | 54 | Head | Clerk | Ireland |
| 69 | Catherine Cassidy | 52 | Wife | — | Ireland |
| 70 | Thomas Cassidy | 27 | Son | Electrician | New York |
| 71 | John Cassidy | 25 | Son | Asst. Supt. | New York |
| 72 | Mary Cassidy | 23 | Daughter | Stenographer | New York |
| 73 | Kathleen Cassidy | 20 | Daughter | Stenographer | New York |
| 74 | Margaret Cassidy | 18 | Daughter | — | New York |
| 75 | Rita Cassidy | 15 | Daughter | — | New Jersey |
| 76 | James Cassidy | 11 | Son | — | New York |
| 77 | Edward Goldberg | 43 | Head | Salesman | New York |
| 78 | Anna Goldberg | 40 | Wife | — | France |
| 79 | Jerome Goldberg | 17 | Son | Clerk | New York |
| 80 | Daniel Goldberg | 15 | Son | — | New York |
| 81 | Philip Goldberg | 13 | Son | — | New York |
| 82 | Frances Goldberg | 11 | Daughter | — | New York |
| 83 | Chester Goldberg | 6 | Son | — | New York |
| 84 | George A. Rose | 35 | Head | Salesman | New York |
| 85 | Annie Rose | 66 | Mother | — | New York |
| 86 | Frank A. Cannon | 57 | Head | Salesman | New York |
| 87 | Jane Cannon | 60 | Sister | — | New York |
| 88 | Thomas F. Hurley | 50 | Step-son | Shipper | New York |
| 89 | James Duffy THIS PERSON | 35 | Head | Foreman | Ireland |
| 90 | Catherine Duffy | 33 | Wife | — | Ireland |
| 91 | James F. Duffy | 6 | Son | — | New York |
| 92 | T. Radermacher | 8 | Daughter | — | New York |
| 93 | Margaret M. Radermacher | 5 | Daughter | — | New York |
| 94 | Martin Radermacher | 36 | Brother | Platform | Ireland |
| 95 | Peter Gromis | 42 | Head | Owner | Macedonia |
| 96 | Anna Gromis | 35 | Wife | — | Macedonia |
| 97 | John Gromis | 16 | Son | — | Macedonia |
| 98 | Agnes Gromis | 13 | Daughter | — | Macedonia |
| 99 | Peter Mcdermott | 27 | Head | Counterman | Ireland |
| 100 | Mary Mcdermott | 25 | Wife | — | Ireland |
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)