IT
Isaac Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Schuylkill-County, Pennsylvania
Our Model Tree links this Isaac Thomas across the 1910, 1920, 1930 and 1940 US Censuses in Schuylkill-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Isaac & Edith — first a head (b.~1898), then head of a 6-person household.
Age 42
b. ~1898
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Schuylkill-County, Pennsylvania |
| Surname | Thomas |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Coles Patch |
| 1935 Residence (County) | Schuylkill |
| Additional Details | |
| Occupation | Laborer |
| Industry | Coal Stripping |
| Class of Worker | PW |
| Hours Worked | 14 |
| Income (1939) | 454 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | Coles Patch |
| Est. Birth Year | ~1898 |
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 Isaac | Age | Birth yr |
|---|---|---|---|---|
| Irene Thomas | Spouse | — | 38 | ~1902 |
| Thomas Dollin | Other | — | 21 | ~1919 |
| Isaac Thomas | Head | — | 42 | ~1898 |
| Thomas Dollin | Other | — | ~1940 | |
| Isaac Thomas | Other | — | 66 | ~1874 |
| Dorothy Dollin | Daughter | — | 19 | ~1921 |
Census Appearances
1910
Schuylkill, Pennsylvania
Son, age 11
Schuylkill, Pennsylvania · implied b. ~1899 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Schuylkill, Pennsylvania
Son, age 20
Schuylkill, Pennsylvania · implied b. ~1900 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Isaac |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Laborer |
| Industry | Coal Mines |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Schuylkill, Pennsylvania
Head, age 31
Schuylkill, Pennsylvania · implied b. ~1899 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Isaac W. Jr. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 22 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Driver |
| Industry | Coal Mine |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | 10 |
| Veteran | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Schuylkill-County, Pennsylvania
Head, age 42
Schuylkill-County, Pennsylvania · implied b. ~1898 — 6 household members
| Surname | Thomas |
| Given Name | Isaac |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Coles Patch |
| 1935 Residence (County) | Schuylkill |
| Occupation | Laborer |
| Industry | Coal Stripping |
| Class of Worker | PW |
| Hours Worked | 14 |
| Income (1939) | 454 |
| Highest Grade | No 6 |
| 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 Isaac Thomas across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Isaac Thomas (~0.92 confidence) and mother Edith Thomas (~0.92 confidence) and father Isaac Thomas (~0.92 confidence) and mother Alice Thomas (~0.60 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Father
Isaac Thomas
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Edith Thomas
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
Isaac Thomas
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Alice Thomas
b. ~1888
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Isaac Thomas
Head · 1940 · age 42 · b. ~1898 · Pennsylvania
★ 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 — Schuylkill-County, Pennsylvania
Open full size
1940 US Federal Census — Schuylkill-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03603-00096)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edith Lord | 39 | Wife | — | Pennsylvania |
| 42 | Charles Lord | 18 | Son | Laborer | Pennsylvania |
| 43 | George Lord | 76 | Father | Laborer | Pennsylvania |
| 44 | Isaac Thomas THIS PERSON | 42 | Head | Laborer | Pennsylvania |
| 45 | Irene Thomas | 38 | Wife | — | Pennsylvania |
| 46 | Thomas Dollin | 21 | Son-in-law | Truck Driver | Pennsylvania |
| 47 | Dorothy Dollin | 19 | Daughter | — | Pennsylvania |
| 48 | Thomas Dollin | 0 | Grandson | — | Pennsylvania |
| 49 | Isaac Jr Thomas | 66 | Father | Watchman | Pennsylvania |
| 50 | Michael Smelkowski | 63 | Head | — | Austria |
| 51 | Mary Smelkowski | 53 | Wife | — | Pennsylvania |
| 52 | Eva Smelkowski | 21 | Daughter | New Worker | Pennsylvania |
| 53 | Adam Smelkowski | 19 | Son | Laborer | Pennsylvania |
| 54 | Mary Smelkowski | 16 | Daughter | — | Pennsylvania |
| 55 | Dorothy Smelkowski | 15 | Daughter | — | Pennsylvania |
| 56 | Helen Smelkowski | 14 | Daughter | — | Pennsylvania |
| 57 | Rose Smelkowski | 13 | Daughter | — | Pennsylvania |
| 58 | Margaret Anne Smelkowski | 2 | Daughter | — | Pennsylvania |
| 59 | John Mack | 35 | Head | Laborer | Pennsylvania |
| 60 | Freda Mack | 22 | Wife | — | Pennsylvania |
| 61 | John Mack | 3 | Son | — | Pennsylvania |
| 62 | Sabina Hansek | 48 | Head | Teacher | Pennsylvania |
| 63 | Jessie Brobst | 46 | Sister | — | Pennsylvania |
| 64 | Elizabeth Brobst | 18 | Niece | New Worker | Pennsylvania |
| 65 | Sally Rynkiewicz | 63 | Mother | — | Poland |
| 66 | Paul B Williams | 44 | Head | Proprietor | Pennsylvania |
| 67 | Anna Williams | 42 | Wife | — | Pennsylvania |
| 68 | Irene Williams | 18 | Daughter | New Worker | Pennsylvania |
| 69 | Ethel Williams | 16 | Daughter | — | Pennsylvania |
| 70 | Paul Williams | 14 | Son | — | Pennsylvania |
| 71 | Elmer Williams | 13 | Son | — | Pennsylvania |
| 72 | Eleanor Williams | 11 | Daughter | — | Pennsylvania |
| 73 | John Williams | 6 | Son | — | Pennsylvania |
| 74 | Mary Dengler | 59 | Head | — | Austria |
| 75 | Andrew Dengler | 36 | Son | Watchman | Pennsylvania |
| 76 | Stephen Dengler | 26 | Son | — | Pennsylvania |
| 77 | Francis Dengler | 23 | Son | — | Pennsylvania |
| 78 | John Straka | 56 | Head | Laborer | Austria |
| 79 | Pauline Straka | 51 | Wife | — | Austria |
| 80 | Anna Straka | 26 | Daughter | Machine Operator | Pennsylvania |
Related Census Records
Pedigree Summary
Isaac
Gen 1 · 4 parents
~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)