JD
John Duffy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this John Duffy across the 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 10-person household.
Age 21
b. ~1919
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Weehawken |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | Gas Station Attendant |
| Industry | Retail Gasoline |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 780 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Gas Station Attendant |
| Township / Ward | Weehawken |
| Est. Birth Year | ~1919 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Duffy | Daughter | — | 23 | ~1917 |
| Bernice Duffy | Daughter | — | 3 | ~1937 |
| Maureen Duffy | Daughter | — | 5 | ~1935 |
| Bryan Duffy | Daughter | — | 11 | ~1929 |
| Eugene Duffy | Head | — | 43 | ~1897 |
| Eugene Duffy | Son | — | 13 | ~1927 |
| Robert Duffy | Son | — | 7 | ~1933 |
| Margaret Duffy | Son | — | 9 | ~1931 |
| John Duffy | Son | — | 21 | ~1919 |
| May Duffy | Spouse | — | 43 | ~1897 |
Census Appearances
1930
Hudson, New …
Son, age 11
Hudson, New Jersey · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Son, age 21
Hudson-County, New Jersey · implied b. ~1919 — 10 household members
| Surname | Duffy |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Weehawken |
| 1935 Residence (County) | Hudson |
| Occupation | Gas Station Attendant |
| Industry | Retail Gasoline |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 780 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Duffy
Son · 1940 · age 21 · b. ~1919 · New Jersey
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Sibling
Margaret Duffy
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Duffy
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bryan Duffy
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maureen Duffy
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Duffy
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernice Duffy
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Duffy
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02353-01227)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anne Chitliengo | 43 | Wife | Sewer | Turkey |
| 42 | Anne Chitliengo | 14 | Daughter | — | New Jersey |
| 43 | Albert Mariani | 55 | Head | First Mate | New York |
| 44 | Evelyn Mariani | 45 | Wife | — | Northern Ireland |
| 45 | Albert Mariani | 15 | Son | — | New York |
| 46 | James Mariani | 10 | Son | — | New Jersey |
| 47 | Herbert Mariani | 9 | Son | — | New Jersey |
| 48 | Eugene J. Duffy | 43 | Head | Policeman | New Jersey |
| 49 | May Duffy | 43 | Wife | — | New Jersey |
| 50 | Eleanor Duffy | 23 | Daughter | Operator | New Jersey |
| 51 | John Duffy THIS PERSON | 21 | Son | Gas Station Attendant | New Jersey |
| 52 | Eugene Jr. Duffy | 13 | Son | — | New Jersey |
| 53 | Bryan Duffy | 11 | Daughter | — | New Jersey |
| 54 | Margaret Duffy | 9 | Son | — | New Jersey |
| 55 | Robert Duffy | 7 | Son | — | New Jersey |
| 56 | Maureen Duffy | 5 | Daughter | — | New Jersey |
| 57 | Bernice Duffy | 3 | Daughter | — | New Jersey |
| 58 | Loretta Frost | 36 | Head | Saleslady | New Jersey |
| 59 | Maria Beck | 50 | Head | Saleslady | Austria |
| 60 | Yetta Stripper | 62 | Head | — | Russia |
| 61 | Bertha Stripper | 39 | Daughter | Secretary | New York |
| 62 | Emma Stripper | 35 | Daughter | Secretary | New York |
| 63 | Robert Roland | 40 | Head | Salesman | New Jersey |
| 64 | Irene Roland | 33 | Wife | — | New York |
| 65 | Abraham Schulman | 74 | Head | — | Russia |
| 66 | Ida Schulman | 72 | Wife | — | Russia |
| 67 | Harry Schulman | 45 | Son | Salesman | New Jersey |
| 68 | Cecelia Schulman | 35 | Daughter | — | New Jersey |
| 69 | William Leaky | 49 | Head | Steam Fitter | New York |
| 70 | Catharine Leaky | 46 | Wife | — | New York |
| 71 | William Mueller | 32 | Head | Proprietor | England |
| 72 | Bella Mueller | 30 | Wife | — | New York |
| 73 | Elaine Mueller | 7 | Daughter | — | New York |
| 74 | Sheila Mueller | 4 | Daughter | — | New York |
| 75 | Theodore Litoff | 40 | Head | Proprietor | Russia |
| 76 | Betty Litoff | 37 | Wife | — | Russia |
| 77 | Celine Litoff | 11 | Daughter | — | New York |
| 78 | Bertram Litoff | 8 | Son | — | New Jersey |
| 79 | Max Bursan | 48 | Head | Gen Manager | Poland |
| 80 | Sadie Bursan | 46 | Wife | — | Poland |
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)