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Thomas Duffy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this Thomas Duffy across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed), with identified parents Martin & Martin — first a son (b.~1915), then head of a 7-person household.
Age 25
b. ~1915
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Duffy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | Mechanic |
| Industry | Ship Yard |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 336 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Mechanic |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1915 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Martin Duffy | Head | — | 53 | ~1887 |
| Henrietta O'Keefe | Daughter | — | 31 | ~1909 |
| Julia Duffy | Spouse | — | 53 | ~1887 |
| George Duffy | Son | — | 27 | ~1913 |
| Frances O'Keefe | Other | — | 4 | ~1936 |
| Thomas Duffy | Son | — | 25 | ~1915 |
| Edward Duffy | Son | — | 30 | ~1910 |
Census Appearances
1920
Hudson, New …
Son, age 5
Hudson, New Jersey · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Son, age 15
Hudson, New Jersey · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Son, age 25
Hudson-County, New Jersey · implied b. ~1915 — 7 household members
| Surname | Duffy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Occupation | Mechanic |
| Industry | Ship Yard |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 336 |
| Highest Grade | Hs 2 |
| 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 Thomas Duffy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Martin Duffy (~0.92 confidence) and father Martin Duffy (~0.92 confidence) and mother Julia Duffy (~0.92 confidence) and mother Julia Duffy (~0.92 confidence) and mother Julia Duffy (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Martin Duffy
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Martin Duffy
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Julia Duffy
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Julia Duffy
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Julia Duffy
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Duffy
Son · 1940 · age 25 · b. ~1915 · New Jersey
★ You are viewing this record
Sibling
Edward Duffy
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henrietta O'Keefe
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Duffy
Sibling · 1940 · age 27
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-t0627-02408-00616)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Annette Faherty | 21 | Daughter | Beautician | New Jersey |
| 42 | Gerald Faherty | 17 | Son | — | New Jersey |
| 43 | John Faherty | 44 | Head | Motor Vehicle | Pennsy/vania |
| 44 | Agnes Faherty | 44 | Wife | — | New Jersey |
| 45 | Virginia Faherty | 16 | Daughter | — | New Jersey |
| 46 | Barbara Faherty | 15 | Daughter | — | New Jersey |
| 47 | Jack Faherty | 13 | Son | — | New Jersey |
| 48 | Robert Faherty | 9 | Son | — | New Jersey |
| 49 | William Moffat | 48 | Head | Shipfitter | Scotland |
| 50 | Elsie Moffat | 50 | Wife | — | England |
| 51 | James Vallentino | 40 | Head | Engineer St. | Florida |
| 52 | Mary Vallentino | 38 | Wife | — | Ireland FS |
| 53 | John Kearns | 45 | Brother-in-law | Fireman | Ireland FS |
| 54 | Laurence Lynch | 25 | Step-son | Clerk | New Jersey |
| 55 | Martin Sr. Duffy | 53 | Head | — | New Jersey |
| 56 | Julia Duffy | 53 | Wife | — | New Jersey |
| 57 | Edward Duffy | 30 | Son | Chauffer | New Jersey |
| 58 | George Duffy | 27 | Son | Superintendent | New Jersey |
| 59 | Thomas Duffy THIS PERSON | 25 | Son | Mechanic | New Jersey |
| 60 | Henrietta O'Keefe | 31 | Daughter | — | New Jersey |
| 61 | Frances O'Keefe | 4 | Grand-dau. | — | New Jersey |
| 62 | Frank J. Burns | 53 | Head | Bartender | New Jersey |
| 63 | Alice Burns | 48 | Wife | — | New Jersey |
| 64 | Frank Jr. Burns | 25 | Son | Bartender | New Jersey |
| 65 | Joel Burns | 23 | Son | — | New Jersey |
| 66 | Charles Burns | 19 | Son | — | New Jersey |
| 67 | Robert Burns | 15 | Son | — | New Jersey |
| 68 | Margaret Burns | 7 | Daughter | — | New Jersey |
| 69 | Harold Walling | 41 | Head | Salesman | New Jersey |
| 70 | Alice Walling | 39 | Wife | — | New Jersey |
| 71 | Mary Walling | 20 | Daughter | Comptometer | New Jersey |
| 72 | Jane Walling | 15 | Daughter | — | New Jersey |
| 73 | Thomas Ayland | 51 | Head | Ticket Agent | New Jersey |
| 74 | Margaret Ayland | 44 | Wife | — | New Jersey |
| 75 | Lucille Ayland | 24 | Daughter | Clerk | New Jersey |
| 76 | Thomas Jr. Ayland | 21 | Son | — | New Jersey |
| 77 | Anna Manning | 66 | Mother-law | — | New Jersey |
| 78 | Anna Nelson | 26 | Niece | Stenographer | New Jersey |
| 79 | Emily Lampman | 53 | Head | — | New Jersey |
| 80 | Thomas Lampman | 21 | Son | Clerk | New Jersey |
Pedigree Summary
Thomas + 3 siblings
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
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)