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Thomas Duffy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Luzerne-County, Pennsylvania
Our Model Tree links this Thomas Duffy across the 1920, 1930 and 1940 US Censuses in Luzerne-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Thomas & Margaret — first a son (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Luzerne-County, Pennsylvania |
| Surname | Duffy |
| Given Name | Thomas G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Kingston Borough |
| 1935 Residence (County) | Luzerne |
| Additional Details | |
| Occupation | Stock clerk |
| Industry | General Motors |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 266 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Stock Clerk |
| Township / Ward | Kingston Borough |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| Thomas Duffy | Head | — | 58 | ~1882 |
| Edmund Duffy | Son | — | 23 | ~1917 |
| Anna Grady | Other | — | 66 | ~1874 |
| Margaret Duffy | Spouse | — | 58 | ~1882 |
| Paul Duffy | Son | — | 14 | ~1926 |
| Thomas Duffy | Son | — | 25 | ~1915 |
Census Appearances
1920
Luzerne, Pennsylvania
Son, age 5
Luzerne, Pennsylvania · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Thomas P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | England |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Luzerne, Pennsylvania
Son, age 15
Luzerne, Pennsylvania · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duffy |
| Given Name | Thomas J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | England |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Luzerne-County, Pennsylvania
Son, age 25
Luzerne-County, Pennsylvania · implied b. ~1915 — 6 household members
| Surname | Duffy |
| Given Name | Thomas G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Kingston Borough |
| 1935 Residence (County) | Luzerne |
| Occupation | Stock clerk |
| Industry | General Motors |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 266 |
| Highest Grade | Hs 4 |
| 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 Thomas Duffy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Duffy (~0.92 confidence) and mother Margaret Duffy (~0.92 confidence) and mother Margaret Duffy (~0.92 confidence) and mother Margaret Duffy (~0.92 confidence) and father John Boone (~0.84 confidence). The pedigree spans 2 generations with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.9
Father
Thomas Duffy
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Margaret Duffy
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Margaret Duffy
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Margaret Duffy
b. ~1884
Source mother
● Household
· direct · ~0.92
Father
John Boone
b. ~1854
Source mother>father
● Household
· direct · ~0.84
This person
Anchor record
Thomas Duffy
Son · 1940 · age 25 · b. ~1915 · Pennsylvania
★ You are viewing this record
Sibling
Paul Duffy
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edmund Duffy
Sibling · 1940 · age 23
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-t0627-03554-00542)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | David M. Morgan | 19 | Son | — | Pennsylvania |
| 2 | John C. Morgan | 15 | Son | — | Pennsylvania |
| 3 | Thomas W. Loftus | 53 | Head | Telegraph Operator | Pennsylvania |
| 4 | Frances Loftus | 47 | Wife | — | Pennsylvania |
| 5 | Eleanor M. Morgan | 26 | Lodger | File Clerk | Pennsylvania |
| 6 | Albert J. Halsman | 53 | Head | Clerk | Pennsylvania |
| 7 | Valeria Halsman | 46 | Wife | — | New York |
| 8 | Richard E. Rosser | 61 | Head | Power House Engineer | Wales |
| 9 | Mary Joan Rosser | 62 | Wife | — | Wales |
| 10 | Rachel A. Rosser | 24 | Daughter | — | Pennsylvania |
| 11 | Earl W. Ross | 45 | Head | Maintenance Foreman | Virginia |
| 12 | Ida M. Ross | 48 | Wife | — | Pennsylvania |
| 13 | Robert W. Ross | 15 | Son | — | Pennsylvania |
| 14 | William S. Dickie | 50 | Head | Salesman | Pennsylvania |
| 15 | Bertha Dickie | 44 | Wife | — | Pennsylvania |
| 16 | Kenneth Dickie | 23 | Son | New Worker | Pennsylvania |
| 17 | Louis Leger | 44 | Head | Traveling Salesman | Pennsylvania |
| 18 | Cecil Leger | 39 | Wife | — | Pennsylvania |
| 19 | Fred A. Sterling | 58 | Head | Clerk | Pennsylvania |
| 20 | Mary E. Sterling | 58 | Wife | — | Maryland |
| 21 | Thomas P. Duffy | 58 | Head | Fire Boss | England |
| 22 | Margaret Duffy | 58 | Wife | — | Pennsylvania |
| 23 | Thomas G. Duffy THIS PERSON | 25 | Son | Stock Clerk | Pennsylvania |
| 24 | Edmund R. Duffy | 23 | Son | Assistant Cashier | Pennsylvania |
| 25 | Paul Duffy | 14 | Son | — | Pennsylvania |
| 26 | Anna Grady | 66 | Sister-in-law | — | Pennsylvania |
| 27 | Robert Mullen | 48 | Head | Salesman | Pennsylvania |
| 28 | Kathryn Mullen | 47 | Wife | — | New Hampshire |
| 29 | Margaret A. Mullen | 20 | Daughter | — | Pennsylvania |
| 30 | John Mullen | 15 | Son | — | Pennsylvania |
| 31 | Betty Mullen | 10 | Daughter | — | Pennsylvania |
| 32 | Agnes Morgan | 26 | Daughter | Booking | Pennsylvania |
| 33 | Kenneth Church | 62 | Head | Druggist | Pennsylvania |
| 34 | Mary L. Church | 61 | Wife | — | Pennsylvania |
| 35 | John J. Kelly | 45 | Head | Railroad Fireman | Pennsylvania |
| 36 | Katherine Kelly | 48 | Wife | — | Pennsylvania |
| 37 | John J. Jr. Kelly | 20 | Son | — | Pennsylvania |
| 38 | Bernhard Kelly | 18 | Son | — | Pennsylvania |
| 39 | Mary Kelly | 17 | Daughter | — | Pennsylvania |
| 40 | Francis Kelly | 14 | Son | — | Pennsylvania |
Related Census Records
Pedigree Summary
Thomas + 2 siblings
Gen 1 · 4 parents
~0.92
Gen 2 · 1 grandparents
~0.84
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)