DT
David Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Luzerne-County, Pennsylvania
Our Model Tree links this David Thomas across the 1920, 1930 and 1940 US Censuses in Luzerne-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents David & Bertha — first a son (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Luzerne-County, Pennsylvania |
| Surname | Thomas |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Plymouth Borough |
| 1935 Residence (County) | Luzerne |
| Additional Details | |
| Occupation | Labour |
| Industry | Coal mine |
| Class of Worker | PW |
| Hours Worked | 21 |
| Income (1939) | 400 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Labour |
| Township / Ward | Plymouth Borough |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| Alice Schmidt | Daughter | — | 37 | ~1903 |
| Eloie Thomas | Daughter | — | 35 | ~1905 |
| Bertha Thomas | Head | — | 58 | ~1882 |
| John Schmidt | Other | — | 10 | ~1930 |
| David Thomas | Son | — | 22 | ~1918 |
Census Appearances
1920
Luzerne, Pennsylvania
Son, age 1
Luzerne, Pennsylvania · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Wales |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| 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 | Thomas |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Wales |
| 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 — 5 household members
| Surname | Thomas |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Plymouth Borough |
| 1935 Residence (County) | Luzerne |
| Occupation | Labour |
| Industry | Coal mine |
| Class of Worker | PW |
| Hours Worked | 21 |
| Income (1939) | 400 |
| Highest Grade | H 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 David Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father David Thomas (~0.92 confidence) and mother Bertha Thomas (~0.92 confidence) and mother Mabel Thomas (~0.92 confidence) and father David Thomas (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
David Thomas
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Bertha Thomas
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Mabel Thomas
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
David Thomas
b. ~1884
Source father
● Household
· direct · ~0.92
This person
Anchor record
David Thomas
Son · 1940 · age 22 · b. ~1918 · Pennsylvania
★ You are viewing this record
Sibling
Eloie Thomas
Sibling · 1940 · age 35
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Schmidt
Sibling · 1940 · age 37
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-t0627-03559-00642)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Myron Hummel | 15 | Son | — | Pennsylvania |
| 2 | Dorothy Hummel | 13 | Daughter | — | Pennsylvania |
| 3 | Betty Lou Hummel | 9 | Daughter | — | Pennsylvania |
| 4 | Harry Mafia | 45 | Head | Truck Driver | Pennsylvania |
| 5 | Rachel Mafia | 43 | Wife | — | Pennsylvania |
| 6 | Bertha Thomas | 58 | Head | — | Pennsylvania |
| 7 | Eloie Thomas | 35 | Daughter | School Teacher | Pennsylvania |
| 8 | David Thomas THIS PERSON | 22 | Son | Labour | Pennsylvania |
| 9 | Alice Schmidt | 37 | Daughter | — | Pennsylvania |
| 10 | John Schmidt | 10 | Grandson | — | Pennsylvania |
| 11 | Frank Dempsey | 71 | Head | — | Pennsylvania |
| 12 | Clara Dempsey | 65 | Wife | — | Pennsylvania |
| 13 | Martha Dempsey | 41 | Daughter | — | Pennsylvania |
| 14 | Katherine Dempsey | 14 | Granddaughter | — | Pennsylvania |
| 15 | Joseph Hobba | 34 | Head | Machinist | Pennsylvania |
| 16 | William Hahn | 18 | Nephew | — | Pennsylvania |
| 17 | Clara Fore | 67 | Housekeeper | Housekeeper | Pennsylvania |
| 18 | Harry Williams | 42 | Head | Butcher | Pennsylvania |
| 19 | Lenore Williams | 36 | Wife | — | Pennsylvania |
| 20 | Gerald Williams | 7 | Son | — | Pennsylvania |
| 21 | George Williams | 7 | Son | — | Pennsylvania |
| 22 | Harry Williams | 5 | Son | — | Pennsylvania |
| 23 | Elizabeth Williams | 4 | Daughter | — | Pennsylvania |
| 24 | Eleanor Williams | 4 | Daughter | — | Pennsylvania |
| 25 | James Williams | 2 | Son | — | Pennsylvania |
| 26 | Earl Eveland | 50 | Head | Laborer | Pennsylvania |
| 27 | Janet Eveland | 41 | Wife | — | Pennsylvania |
| 28 | Walter Gerzarowski | 23 | Lodger | Clerk | Pennsylvania |
| 29 | Margaret Gerzarowski | 19 | Lodger | — | Pennsylvania |
| 30 | Mary Baird | 63 | Head | — | Pennsylvania |
| 31 | Ruth Baird | 56 | Sister | — | Pennsylvania |
| 32 | Leo Matisiewicz | 30 | Head | Manager | Pennsylvania |
| 33 | Kathleen Matisiewicz | 29 | Wife | — | Pennsylvania |
| 34 | Leo Matisiewicz | 4 | Son | — | Pennsylvania |
| 35 | William Matisiewicz | 2 | Son | — | Pennsylvania |
| 36 | Leah Griffith | 42 | Head | School Teacher | Pennsylvania |
| 37 | Jane Griffith | 14 | Niece | — | Pennsylvania |
| 38 | George Mayer | 36 | Head | Mule Driver | Pennsylvania |
| 39 | Mary Mayer | 38 | Wife | — | Poland |
| 40 | George O'Rourke | 32 | Head | Laborer | Pennsylvania |
Pedigree Summary
David + 2 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)