JD
James Duffy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Luzerne-County, Pennsylvania
Our Model Tree links this James Duffy across the 1920, 1930 and 1940 US Censuses in Luzerne-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Martin & Bridget — first a son (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Luzerne-County, Pennsylvania |
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Wilkes-Barre City |
| 1935 Residence (County) | Luzerne |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Retail Coal Yard |
| Class of Worker | PW |
| Hours Worked | 8 |
| Income (1939) | 572 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Truck Driver |
| Township / Ward | Wilkesbarre City |
| Est. Birth Year | ~1918 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Catherine Duffy | Daughter | — | 25 | ~1915 |
| Patrick Duffy | Head | — | 47 | ~1893 |
| James Duffy | Son | — | 22 | ~1918 |
| Charles Duffy | Son | — | 18 | ~1922 |
| Edward Duffy | Son | — | 16 | ~1924 |
| Gertrude Duffy | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Luzerne, Pennsylvania
Son, age 1
Luzerne, Pennsylvania · implied b. ~1919 — 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 | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Luzerne, Pennsylvania
Son, age 12
Luzerne, Pennsylvania · implied b. ~1918 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Luzerne-County, Pennsylvania
Son, age 22
Luzerne-County, Pennsylvania · implied b. ~1918 — 6 household members
| Surname | Duffy |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Wilkes-Barre City |
| 1935 Residence (County) | Luzerne |
| Occupation | Truck Driver |
| Industry | Retail Coal Yard |
| Class of Worker | PW |
| Hours Worked | 8 |
| Income (1939) | 572 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Martin Duffy (~0.92 confidence) and mother Bridget Duffy (~0.92 confidence) and mother Gertrude Duffy (~0.92 confidence) and father Patrick Duffy (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Martin Duffy
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Bridget Duffy
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Gertrude Duffy
b. ~1893
Source mother
● Household
· direct · ~0.92
Father
Patrick Duffy
b. ~1893
Source father
● Household
· direct · ~0.92
This person
Anchor record
James Duffy
Son · 1940 · age 22 · b. ~1918 · Pennsylvania
★ You are viewing this record
Sibling
Edward Duffy
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Duffy
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Duffy
Sibling · 1940 · age 18
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 — Luzerne-County, Pennsylvania
Open full size
1940 US Federal Census — Luzerne-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03562-00059)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Catherine Dombert | 11 | daughter | — | Pennsylvania |
| 42 | Anna Dombert | 9 | daughter | — | Pennsylvania |
| 43 | Mildred Dombert | 8 | daughter | — | Pennsylvania |
| 44 | David Dombert | 5 | son | — | Pennsylvania |
| 45 | Harry Dombert | 4 | son | — | Pennsylvania |
| 46 | Joseph Dombert | 1 | son | — | Pennsylvania |
| 47 | Susan Remick | 49 | Head | — | Pennsylvania |
| 48 | John Remick | 29 | son | Supporter | Pennsylvania |
| 49 | Albert Remick | 25 | son | Threader | Pennsylvania |
| 50 | Joseph Remick | 23 | son | Laborer | Pennsylvania |
| 51 | Carl Remick | 19 | son | — | Pennsylvania |
| 52 | Emily Remick | 17 | daughter | — | Pennsylvania |
| 53 | Martha Remick | 15 | daughter | — | Pennsylvania |
| 54 | Joseph Cigler | 47 | Head | Miner | Austria |
| 55 | Mary Cigler | 45 | Wife | — | Pennsylvania |
| 56 | Joseph Cigler | 19 | son | New Worker | Pennsylvania |
| 57 | Marie Cigler | 16 | daughter | — | Pennsylvania |
| 58 | Anthony Cigler | 11 | son | — | Pennsylvania |
| 59 | Philameda Cigler | 6 | daughter | — | Pennsylvania |
| 60 | George Gomba | 57 | Head | Miner | Czechoslovakia |
| 61 | Anna Gomba | 45 | Wife | — | Czechoslovakia |
| 62 | George Gomba | 18 | son | — | Pennsylvania |
| 63 | Michael Gomba | 16 | son | — | Pennsylvania |
| 64 | Andrew Gomba | 15 | son | — | Pennsylvania |
| 65 | Nicholas Gomba | 12 | son | — | Pennsylvania |
| 66 | Emil Gomba | 10 | son | — | Pennsylvania |
| 67 | Chester Mahalet | 38 | Head | Fireman | Pennsylvania |
| 68 | Helen Mahalet | 35 | Wife | — | Pennsylvania |
| 69 | Chester Jr. Mahalet | 7 | son | — | Pennsylvania |
| 70 | Martin Fenn | 35 | Head | Mason | Pennsylvania |
| 71 | Catherine Fenn | 33 | Wife | — | Pennsylvania |
| 72 | Martin J. Fenn | 12 | son | — | Pennsylvania |
| 73 | Thomas Fenn | 5 | son | — | Pennsylvania |
| 74 | Grace Kruse | 40 | Head | Seamstress | Pennsylvania |
| 75 | Patrick Duffy | 47 | Head | Laborer | Pennsylvania |
| 76 | Gertrude Duffy | 47 | Wife | — | Pennsylvania |
| 77 | Catherine Duffy | 25 | daughter | Folder | Pennsylvania |
| 78 | James Duffy THIS PERSON | 22 | son | Truck Driver | Pennsylvania |
| 79 | Charles Duffy | 18 | son | New Worker | Pennsylvania |
| 80 | Edward Duffy | 16 | son | — | Pennsylvania |
Pedigree Summary
James + 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)