JD
John Duffy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this John Duffy across the 1910, 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a head (b.~1881), then head of a 4-person household.
Age 59
b. ~1881
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Duffy |
| Given Name | John J. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Bartender |
| Industry | Beer Hall |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| Highest Grade | No 7 |
| 1935 Residence | Same Place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Bartender |
| Township / Ward | New York City |
| Est. Birth Year | ~1881 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Ida Duffy | Daughter | — | 24 | ~1916 |
| Rose Duffy | Daughter | — | 31 | ~1909 |
| John Duffy | Head | — | 59 | ~1881 |
| Mary Duffy | Spouse | — | 58 | ~1882 |
Census Appearances
1910
Kings, New …
Head, age 32
Kings, New York · implied b. ~1878 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 6 |
| Children Living | 1896 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Barkeeper |
| Industry | Hotel |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
Kings, New …
Head, age 42
Kings, New York · implied b. ~1878 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1897 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Clerical |
| Industry | Office |
| 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 | 1904 |
| Birthplace (normalized) | ireland |
1930
Kings, New …
Head, age 50
Kings, New York · implied b. ~1880 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1905 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Clerk |
| Industry | Steamship Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 32 |
| Radio Set | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Kings-County, New …
Head, age 59
Kings-County, New York · implied b. ~1881 — 4 household members
| Surname | Duffy |
| Given Name | John J. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Occupation | Bartender |
| Industry | Beer Hall |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1300 |
| 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 John Duffy across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Duffy
Head · 1940 · age 59 · b. ~1881 · New York
★ You are viewing this record
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-t0627-02610-00637)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Selma Mishkin | 19 | daughter | Stenographer | New York |
| 42 | Beverly Mishkin | 15 | daughter | — | New York |
| 43 | Morris Schneider | 32 | head | Credit Man | Russia |
| 44 | Rose Schneider | 24 | wife | Supervisor | Massachusetts |
| 45 | Martin Axman | 27 | head | Baker | New York |
| 46 | Natalie Axman | 25 | wife | — | New York |
| 47 | Murray Mineky|Minsky | 29 | head | Agent | New York |
| 48 | Gertrude Mineky|Minsky | 24 | wife | — | New York |
| 49 | Bernard Mineky|Minsky | 5 | son | — | New York |
| 50 | Harry Ohren | 42 | head | Proprietor | Russia |
| 51 | Rose Ohren | 42 | wife | Assistant To Store | Russia |
| 52 | Shellond Ohren | 7 | son | — | New York |
| 53 | Herman Glaser | 43 | brother-in-law | Proprietor | Russia |
| 54 | Lena Nehmer | 64 | head | — | Austria |
| 55 | Joseph Nehmer | 30 | son | Salesman | New York |
| 56 | Abraham Dropkin|Drapkin | 47 | head | Upholsterer | Russia |
| 57 | Sarah Dropkin|Drapkin | 42 | wife | — | Russia |
| 58 | Edward Dossard | 25 | head | Clerk | New York |
| 59 | Elinor Dossard | 26 | wife | — | New York |
| 60 | Irving Freedman | 36 | head | Letter Carrier | New York |
| 61 | Sally Freedman | 32 | wife | — | New York |
| 62 | Gerald Freedman | 7 | son | — | New York |
| 63 | John De Nave | 36 | head | Printer | New York |
| 64 | Ameli De Nave | 24 | wife | — | New York |
| 65 | John J. Duffy THIS PERSON | 59 | head | Bartender | Ireland |
| 66 | Mary Duffy | 58 | wife | — | Ireland |
| 67 | Rose Duffy | 31 | daughter | Looper | New York |
| 68 | Ida Duffy | 24 | daughter | Tipper | New York |
| 69 | Anthony Davis | 34 | head | Superintendent | Washington D.C. |
| 70 | Katherine Davis | 33 | wife | — | New York |
| 71 | Helen Davis | 10 | daughter | — | New York |
| 72 | Mary Davis | 0 | daughter | — | New York |
| 73 | Jacob Smith | 65 | head | — | Poland |
| 74 | Minnie Smith | 60 | wife | — | Poland |
| 75 | Ruth Smith | 24 | daughter | Buyer | New York |
| 76 | Frank Turk | 45 | head | Investigator | New York |
| 77 | Clara Turk | 38 | wife | — | New York |
| 78 | Francis Turk | 15 | son | Page | New York |
| 79 | Kenneth Turk | 5 | son | — | New York |
| 80 | Delmar Steiner | 39 | head | — | Austria |
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)