JD
John Duffy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · New-York-County, New York
Our Model Tree links this John Duffy across the 1900, 1910, 1920, 1930 and 1940 US Censuses in New-York-County, New York (XGBoost, ~Confirmed) — first a head (b.~1867), then head of a 2-person household.
Age 73
b. ~1867
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | New-York-County, New York |
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | New York |
| Naturalization Status | Naturalized |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | New York |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | New York City |
| Est. Birth Year | ~1867 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Duffy | Daughter | — | 43 | ~1897 |
| John Duffy | Head | — | 73 | ~1867 |
Census Appearances
1900
New York, …
Other, age 32
New York, New York · implied b. ~1868 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffey |
| Given Name | John |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Ireland |
| Birth Month | May |
| Birth Year | 1868 |
| Year of Immigration | 1889 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Hostler |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1910
New York, …
Head, age 41
New York, New York · implied b. ~1869 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Ireland |
| Years Married | 4 |
| Year of Immigration | 1889 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Salesman |
| Industry | Dock |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1920
New York, …
Head, age 50
New York, New York · implied b. ~1870 — 9 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 |
| Year of Immigration | 1888 |
| Naturalization Status | Alien |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
New York, …
Other, age 63
New York, New York · implied b. ~1867 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffey |
| Given Name | John |
| Relationship to Head | Roomer |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Naturalization Status | First papers filed |
| Year of Immigration | 1891 |
| Age at First Marriage | 40 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
New-York-County, New …
Head, age 73
New-York-County, New York · implied b. ~1867 — 2 household members
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | New York |
| Naturalization Status | Naturalized |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | New York |
| 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 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Duffy
Head · 1940 · age 73 · b. ~1867 · 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 — New-York-County, New York
Open full size
1940 US Federal Census — New-York-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02637-00928)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Geraldi Geraldine Fitzgerald | 19 | Daughter | Stenographer | New York |
| 2 | John F Fitzgerald | 16 | Son | — | New York |
| 3 | William C Fitzgerald | 47 | Nephew | Weaver | New York |
| 4 | Rocco Capello | 65 | Head | Laborer | Italy |
| 5 | Helen Capello | 50 | Wife | — | Austria |
| 6 | James Capello | 26 | Son | Milk Driver | New York |
| 7 | Helen Capello | 23 | Daughter | Tea Packer | New York |
| 8 | Helen Alexander | 4 | Granddaughter | — | New York |
| 9 | Anna Capello | 25 | Daughter | Dressmaker | Porto Rico |
| 10 | George Kipp | 71 | Head | — | New York |
| 11 | Leo Kipp | 43 | Son | Driver | New York |
| 12 | William Kipp | 41 | Son | Chauffeur | New York |
| 13 | Hugh Kipp | 37 | Son | Chauffeur | New York |
| 14 | George Kipp | 34 | Son | Driver | New York |
| 15 | Peter Rumney | 62 | Head | Laborer | Ireland |
| 16 | Elizabeth Rumney | 59 | Wife | — | Ireland |
| 17 | Frank Travagna | 59 | Head | — | Italy |
| 18 | Emma Travagna | 54 | Wife | — | New York |
| 19 | Rose Cullen | 50 | Roomer | Nurse | New York |
| 20 | Spencer Valkenburgh | 33 | Head | Clerk | New York |
| 21 | Katherine Valkenburgh | 29 | Wife | — | New York |
| 22 | Patricia Valkenburgh | 7 | Daughter | — | New York |
| 23 | Langdon Valkenburgh | 3 | Son | — | New York |
| 24 | Lamberis Lawrence | 60 | Roomer | Laborer | Greece |
| 25 | Eleftheria Lawrence | 43 | Wife | — | Greece |
| 26 | Constantine Lawrence | 5 | Son | — | New York |
| 27 | Despina Lawrence | 2 | Daughter | — | New York |
| 28 | John Duffy THIS PERSON | 73 | Head | — | Ireland |
| 29 | Margaret Duffy | 43 | Daughter | Grader | New York |
| 30 | Charles Rochester | 65 | Head | — | New York |
| 31 | Katherine Rochester | 55 | Wife | — | New York |
| 32 | Ralph Herbert | 27 | Son-in-law | Coal Truck Driver | New York |
| 33 | Ray Herbert | 26 | Daughter | — | New York |
| 34 | Charles A Herbert | 1 | Son | — | New York |
| 35 | Fred Beam | 62 | Roomer | Kitchen Man | New York |
| 36 | Lucy Paccicacco | 50 | Head | — | Italy |
| 37 | Michael Paccicacco | 26 | Son | Clerk | New York |
| 38 | Salvatore Paccicacco | 22 | Son | Clerk | New York |
| 39 | Jennie Paccicacco | 21 | Daughter | Saleslady | New York |
| 40 | Emma Paccicacco | 17 | Daughter | — | New York |
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)