JD
James Duffy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this James Duffy across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents James & Jas — first a head (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Broken Glass Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Truck Driver |
| Township / Ward | New York City |
| Est. Birth Year | ~1911 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Elaine Duffy | Daughter | — | 5 | ~1935 |
| James Duffy | Head | — | 29 | ~1911 |
| Catherine Duffy | Spouse | — | 26 | ~1914 |
Census Appearances
1920
Kings, New …
Son, age 8
Kings, New York · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| 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
Kings, New …
Son, age 19
Kings, New York · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Head, age 29
Kings-County, New York · implied b. ~1911 — 3 household members
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | New York City |
| 1935 Residence (County) | Kings |
| Occupation | Truck Driver |
| Industry | Broken Glass Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | No 7 |
| 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 Jas Duffy (~0.92 confidence) and mother Katherine Duffy (~0.92 confidence) and mother Mabel Duffy (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Duffy
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Jas Duffy
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Katherine Duffy
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Mabel Duffy
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Duffy
Head · 1940 · age 29 · b. ~1911 · 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 — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
36 people indexed on this census page (nara:1940:m-t0627-02584-00903)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Soffel | 21 | Head | Trimmer | New York |
| 42 | John Traeger | 45 | Head | Shipping Clerk | New York |
| 43 | Katie Traeger | 49 | Wife | — | New York |
| 44 | Joseph Traeger | 21 | Son | Office Clerk | New York |
| 45 | Catherine Traeger | 18 | Daughter | New Worker | New York |
| 46 | John Traeger | 13 | Son | — | New York |
| 47 | William Berg | 82 | Mother in law | — | Germany |
| 48 | Harold E Ingale | 39 | Head | Oiler | Georgia |
| 49 | Rudolf Rahl | 55 | Head | Ship Clerk | New York |
| 50 | Lillian Rahl | 41 | Wife | Wrapper | New York |
| 51 | Catherine Beck | 53 | Head | — | New York |
| 52 | Raymond Beck | 20 | Son | Clerk | New York |
| 53 | Victor Brisbois | 61 | Head | Glass Cutter | France |
| 54 | Caroline Brisbois | 58 | Wife | — | New York |
| 55 | Lewis Brisbois | 32 | Son | Counter Man | New York |
| 56 | Caroline Brisbois | 18 | Daughter | New Worker | New York |
| 57 | Fred Elethorp | 31 | Head | Foreman | New York |
| 58 | Mabel Elethorp | 33 | Wife | — | New York |
| 59 | James Elethorp | 1 | Son | — | New York |
| 60 | Rodney Mialler | 22 | Cousin | Watchman | New York |
| 62 | Henry Gander | 50 | Head | Laborer | New York |
| 63 | Bertha Gander | 46 | Wife | — | New York |
| 64 | Roy Gander | 22 | Son | Truck Helper | New York |
| 65 | James Duffy THIS PERSON | 29 | Head | Truck Driver | New York |
| 66 | Catherine Duffy | 26 | Wife | — | New York |
| 67 | Elaine Duffy | 5 | Daughter | — | New York |
| 68 | Charles Edwards | 36 | Head | Electrician | New York |
| 69 | Ester Edwards | 36 | Wife | — | New York |
| 70 | Virginia Edwards | 14 | Daughter | — | New York |
| 71 | Bertha Edwards | 12 | Daughter | — | New York |
| 72 | Edwin Edwards | 9 | Son | — | New York |
| 73 | James Edwards | 7 | Son | — | New York |
| 74 | Carl White | 52 | Uncle | Bar Tender | New York |
| 75 | Richard Muller | 40 | Head | Proprietor | Germany |
| 76 | Rosa Muller | 32 | Wife | — | Germany |
| 77 | Madeline Muller | 10 | Daughter | — | New York |
Pedigree Summary
James
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)