JD
James Duffy — 1940 US Census Record
Model Tree available1940 United States Federal Census · New-York-County, New York
Our Model Tree links this James Duffy across the 1920, 1930 and 1940 US Censuses in New-York-County, New York (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1910), then head of a 5-person household.
Age 30
b. ~1910
Male
Son
Born: New York
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | New-York-County, New York |
| Surname | Duffy |
| Given Name | James Jr. |
| Relationship to Head | SON |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | New York |
| Additional Details | |
| Occupation | LABORER |
| Industry | Bld-CONST |
| Class of Worker | PW |
| Hours Worked | 18 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Laborer |
| Township / Ward | New York City |
| Est. Birth Year | ~1910 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| June Duffy | Daughter | — | 6 | ~1934 |
| Eileen Duffy | Daughter | — | 2 | ~1938 |
| James Duffy | Head | — | 60 | ~1880 |
| James Duffy | Son | — | 30 | ~1910 |
| Annie Duffy | Spouse | — | 52 | ~1888 |
Census Appearances
1920
New York, …
Son, age 9
New York, New York · implied b. ~1911 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | James Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
New York, …
Son, age 18
New York, New York · implied b. ~1912 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | James Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | Packer |
| Industry | Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
New-York-County, New …
Son, age 30
New-York-County, New York · implied b. ~1910 — 5 household members
| Surname | Duffy |
| Given Name | James Jr. |
| Relationship to Head | SON |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | New York |
| Occupation | LABORER |
| Industry | Bld-CONST |
| Class of Worker | PW |
| Hours Worked | 18 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 James Duffy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Duffy (~0.92 confidence) and father James Duffy (~0.92 confidence) and mother Annie Duffy (~0.92 confidence) and father James Duffy (~0.92 confidence) and mother Annie Duffy (~0.92 confidence) and mother Mary Duffy (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Duffy
b. ~1880
Source father
● Household
· direct · ~0.92
Father
James Duffy
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Annie Duffy
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
James Duffy
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Annie Duffy
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Mary Duffy
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Duffy
Son · 1940 · age 30 · b. ~1910 · New York
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Sibling
Eileen Duffy
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
June Duffy
Sibling · 1940 · age 6
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 — 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-t0627-02629-00316)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Adolf Andrews | 39 | HEAD | Laborer | Argentina |
| 2 | Carmen Andrews | 25 | WIFE | — | Argentina |
| 3 | Gladys Andrews | 5 | DAUGHTER | — | New York |
| 4 | James Sr. Duffy | 60 | HEAD | Gardner | United States |
| 5 | Annie Duffy | 52 | WIFE | — | United States |
| 6 | James Jr. Duffy THIS PERSON | 30 | SON | Laborer | New York |
| 7 | June Duffy | 6 | DAUGHTER | — | New York |
| 8 | Eileen Duffy | 2 | DAUGHTER | — | New York |
| 9 | Thomas Burke | 58 | HEAD | Butcher | New York |
| 10 | Mary Burke | 59 | WIFE | — | New York |
| 11 | Frank Rogueh | 55 | HEAD | Tailor | Austria |
| 12 | Olga Rogueh | 52 | WIFE | — | Austria |
| 13 | Ivan Rogueh | 15 | SON | — | New York |
| 14 | Felix Plonski | 51 | HEAD | Laborer | POLAND |
| 15 | Helen Plonski | 43 | WIFE | — | POLAND |
| 16 | Helen Plonski | 17 | DAUGHTER | — | New York |
| 17 | Jessie Plonski | 14 | DAUGHTER | — | New York |
| 18 | Sophie Plonski | 11 | DAUGHTER | — | New York |
| 19 | Frances Plonski | 10 | SON | — | New York |
| 20 | Alex Borga | 26 | HEAD | Clerk | New York |
| 21 | Lillian Borga | 27 | WIFE | — | New York |
| 22 | Lillian Borga | 11 | DAUGHTER | — | New York |
| 23 | Frances Borga | 9 | SON | — | New York |
| 24 | Dorothy Borga | 7 | DAUGHTER | — | New York |
| 25 | Alfred Borga | 6 | SON | — | New York |
| 26 | Wanda Borga | 3 | DAUGHTER | — | New York |
| 27 | Amos Anderson | 67 | HEAD | Captain | NORWAY |
| 28 | Michael Dovos | 61 | HEAD | Furrier | Greece |
| 29 | Anna Dovos | 58 | WIFE | — | New York |
| 30 | Thomas Dovos | 21 | SON | — | New York |
| 31 | Donald Dovos | 13 | SON | — | New York |
| 32 | Catherine Dovos | 7 | DAUGHTER | — | New York |
| 33 | Edward Kessel | 28 | HEAD | Longshoreman | New York |
| 34 | Anna Kessel | 12 | DAUGHTER | — | New York |
| 35 | Annabella Kessel | 3 | DAUGHTER | — | New York |
| 36 | Thomas Hoey | 29 | HEAD | Longshoreman | New York |
| 37 | Anna Hoey | 24 | WIFE | — | New York |
| 38 | Thomas Hoey | 8 | SON | — | New York |
| 39 | Joan Hoey | 5 | DAUGHTER | — | New York |
| 40 | Michael Hoey | 4 | SON | — | New York |
Pedigree Summary
James + 2 siblings
Gen 1 · 6 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)