TD
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 William & William — first a son (b.~1905), then head of a 6-person household.
Age 35
b. ~1905
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 | 35 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Occupation | Clerk |
| Industry | Brokerage |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 2000 |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Clerk |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1905 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| William Duffy | Head | — | 67 | ~1873 |
| Helen Mcgrath | Daughter | — | 32 | ~1908 |
| Josephine Duffy | Spouse | — | 65 | ~1875 |
| John Duffy | Son | — | 34 | ~1906 |
| Claire Duffy | Daughter | — | 21 | ~1919 |
| Thomas Duffy | Son | — | 35 | ~1905 |
Census Appearances
1920
Hudson, New …
Son, age 15
Hudson, New Jersey · implied b. ~1905 — 4 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 Jersey |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Hudson, New …
Son, age 25
Hudson, New Jersey · implied b. ~1905 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Clerk |
| Industry | Brokerage |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Hudson-County, New …
Son, age 35
Hudson-County, New Jersey · implied b. ~1905 — 6 household members
| Surname | Duffy |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Occupation | Clerk |
| Industry | Brokerage |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 2000 |
| Highest Grade | C 3 |
| 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 William Duffy (~0.92 confidence) and father William Duffy (~0.92 confidence) and mother Josephine Duffy (~0.92 confidence) and mother Josephine Duffy (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Duffy
b. ~1873
Source father
● Household
· direct · ~0.92
Father
William Duffy
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Josephine Duffy
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Josephine Duffy
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Duffy
Son · 1940 · age 35 · b. ~1905 · New Jersey
★ You are viewing this record
Sibling
Helen Mcgrath
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Duffy
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Claire Duffy
Sibling · 1940 · age 21
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-t0627-02408-00217)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eva Miller | 47 | Wife | — | Russia |
| 2 | Beatrice Miller | 18 | Daughter | Stenog. | New York |
| 3 | Rose Peaker | 27 | Daughter | — | New York |
| 4 | Larry Peaker | 27 | Son-in-law | Salesman | New Jersey |
| 5 | Stewart Peaker | 5 | Grandson | — | New Jersey |
| 6 | Julia Wojtowicz | 26 | Housekeeper | Houseworker | Pennsylvania |
| 7 | David Horelick | 47 | Head | Stationary | Russia |
| 8 | Celia Horelick | 40 | Wife | — | Russia |
| 9 | Pearl Horelick | 17 | Daughter | — | New York |
| 10 | Arnold Horelick | 12 | Son | — | New York |
| 11 | Ida Schneiderman | 75 | Mother-in-law | — | Russia |
| 12 | Edmund Mcknight | 45 | Head | Owner | New Jersey |
| 13 | Sarah Mcknight | 30 | Wife | — | New Jersey |
| 14 | Herbert Mcknight | 15 | Son | — | New Jersey |
| 15 | James Mcknight | 10 | Son | — | New Jersey |
| 16 | Myrna Mcknight | 5 | Daughter | — | New Jersey |
| 17 | George Stephens | 48 | Head | Waiter | Greece |
| 18 | Jessie Stephens | 45 | Wife | — | Greece |
| 19 | Denise Stephens | 17 | Daughter | — | New York |
| 20 | Manuel Stephens | 16 | Son | — | New York |
| 21 | Cleo Stephens | 15 | Daughter | — | New York |
| 22 | Vincenzo Mastro | 45 | Head | Tailor | Italy |
| 23 | Marianna Mastro | 43 | Wife | — | Italy |
| 24 | Rudolph Mastro | 16 | Son | — | New York |
| 25 | Yolanda Mastro | 14 | Daughter | — | New York |
| 26 | Theresa Mastro | 8 | Daughter | — | New York |
| 27 | Here Ends Block #5 And Begins Block #6 | None | — | — | — |
| 28 | Henry Woodhouse | 25 | Head | Bookkeeper | New Jersey |
| 29 | Louisa Woodhouse | 59 | Mother | — | New Jersey |
| 30 | Reginald Hamel | 34 | Lodger | Chauffeur | Canada |
| 31 | Christopher Schumacher | 72 | Head | — | Germany |
| 32 | Clara Schumacher | 37 | Daughter | Typist | New Jersey |
| 33 | Ralph Thompson | 57 | Head | Operator | Pennsylvania |
| 34 | Maud N. Sanger | 56 | Partner | — | England |
| 35 | William J. Duffy | 67 | Head | Engineer | New Jersey |
| 36 | Josephine Duffy | 65 | Wife | — | New Jersey |
| 37 | Thomas Duffy THIS PERSON | 35 | Son | Clerk | New Jersey |
| 38 | John C. Duffy | 34 | Son | Lawyer | New Jersey |
| 39 | Claire A. Duffy | 21 | Daughter | — | New Jersey |
| 40 | Helen Mcgrath | 32 | Daughter | Teacher | New Jersey |
Pedigree Summary
Thomas + 3 siblings
Gen 1 · 4 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)