JD
James Duffy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this James Duffy across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a head (b.~1880), then head of a 8-person household.
Age 60
b. ~1880
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Duffy |
| Given Name | James X |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Laborer |
| Industry | cleaning |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 400 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Laborer |
| Township / Ward | New York City |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Margaret Duffy | Daughter | — | 25 | ~1915 |
| Susan Duffy | Daughter | — | 20 | ~1920 |
| James Duffy | Head | — | 60 | ~1880 |
| Teresa Lozusky | Other | — | 15 | ~1925 |
| Alice Mckenna | Other | — | 55 | ~1885 |
| John Duffy | Son | — | 22 | ~1918 |
| Leo Duffy | Son | — | 16 | ~1924 |
| Sarah Duffy | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Kings, New …
Head, age 41
Kings, New York · implied b. ~1879 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1902 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | Highways |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Year of Naturalization | 1919 |
| Birthplace (normalized) | ireland |
1930
Kings, New …
Head, age 52
Kings, New York · implied b. ~1878 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1901 |
| Age at First Marriage | 22 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Packer |
| Industry | Dept Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 8,500 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Kings-County, New …
Head, age 60
Kings-County, New York · implied b. ~1880 — 8 household members
| Surname | Duffy |
| Given Name | James X |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Occupation | Laborer |
| Industry | cleaning |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 400 |
| Highest Grade | H-4 |
| 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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This person
Anchor record
James Duffy
Head · 1940 · age 60 · b. ~1880 · New York
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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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02558-00557)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James X Duffy THIS PERSON | 60 | Head | Laborer | Ireland |
| 42 | Sarah Duffy | 45 | Wife | — | Ireland |
| 43 | Margaret Duffy | 25 | Daughter | Typist | New York |
| 44 | John Duffy | 22 | Son | Clerk | New York |
| 45 | Susan Duffy | 20 | Daughter | Clerk | New York |
| 46 | Leo Duffy | 16 | Son | — | New York |
| 47 | Alice Mckenna | 55 | Boarder | — | Brooklyn |
| 48 | Teresa Lozusky | 15 | Boarder | — | Brooklyn |
| 49 | Herman Rossman | 52 | Head | Cooper | Germany |
| 50 | Helen (X) Rossman | 53 | Wife | — | Brooklyn |
| 51 | Helen Rossman | 18 | Daughter | — | New York City |
| 52 | Anne Rossman | 10 | Daughter | — | Brooklyn |
| 53 | George Albrecht | 47 | Brother in law | Cooper | Brooklyn |
| 54 | Max Meindel | 51 | Head | Retired | New York City |
| 55 | Matilda Meindel | 46 | Wife | — | New York City |
| 56 | Joseph Caruana | 49 | Head | Designer | Malta |
| 57 | Ersilia Caruana | 52 | Wife | — | Malta |
| 58 | Arthur Caruana | 19 | Son | Wirer | Brooklyn |
| 59 | John Caruana | 18 | Son | — | Brooklyn |
| 60 | May Caruana | 12 | Daughter | — | Brooklyn |
| 61 | Angus Macleod | 50 | Head | Machinist | Scotland |
| 62 | Amy Macleod | 48 | Wife | — | England |
| 63 | Angus Macleod | 19 | Son | Packer | England |
| 64 | William Macleod | 17 | Son | — | England |
| 65 | Donald Macleod | 14 | Son | — | England |
| 66 | Jean Macleod | 13 | Daughter | — | England |
| 67 | Patrick Sullivan | 50 | Head | Chauffeur | Irish Free State |
| 68 | Frances Sullivan | 50 | Wife | — | Irish Free State |
| 69 | Frances Sullivan | 25 | Daughter | Clerk | Brooklyn |
| 70 | John Sullivan | 24 | Son | Fireman | Brooklyn |
| 71 | John Daly | 56 | Head | Laborer | Irish Free State |
| 72 | Anna Daly | 61 | Wife | — | Irish Free State |
| 73 | Ronald Condron | 27 | Head | Shipping Clerk | New York City |
| 74 | Christina Condron | 29 | Wife | — | Canada |
| 75 | Patricia Condron | 6 | Daughter | — | Brooklyn |
| 76 | Arlene Condron | 2 | Daughter | — | Brooklyn |
| 77 | Leon Murphy | 9 | Boarder | — | Brooklyn |
| 78 | John Nilsen | 62 | Head | Import. | Sweden |
| 79 | Hilda Nilsen | 62 | Wife | — | Sweden |
| 80 | Florence Nilsen | 38 | Daughter | Sewing | Brooklyn |
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)