RT
Ralph Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Ralph Thomas across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Elizabeth & William — first a head (b.~1907), then head of a 3-person household.
Age 33
b. ~1907
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Thomas |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Carpenter |
| Industry | Building construction |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 988 |
| Highest Grade | H-1 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Carpenter |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1907 |
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 Ralph | Age | Birth yr |
|---|---|---|---|---|
| June Thomas | Daughter | — | 7 | ~1933 |
| Lillian Thomas | Spouse | — | 30 | ~1910 |
| Ralph Thomas | Head | — | 33 | ~1907 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 14
Allegheny, Pennsylvania · implied b. ~1906 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Wales |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 23
Allegheny, Pennsylvania · implied b. ~1907 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Ralph S. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Wales |
| Mother's Birthplace | Pennsylvania |
| Occupation | Bond Clerk |
| Industry | Bank |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 33
Allegheny-County, Pennsylvania · implied b. ~1907 — 3 household members
| Surname | Thomas |
| Given Name | Ralph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Carpenter |
| Industry | Building construction |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 988 |
| Highest Grade | H-1 |
| 1935 Residence | Same house |
| 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 Ralph Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Elizabeth Thomas (~0.92 confidence) and father William Thomas (~0.92 confidence) and father W Thomas (~0.92 confidence) and mother Elizabeth Thomas (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Elizabeth Thomas
b. ~1864
Source mother
● Household
· direct · ~0.92
Father
William Thomas
b. ~1864
Source father
● Household
· direct · ~0.92
Father
W Thomas
b. ~1865
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Thomas
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ralph Thomas
Head · 1940 · age 33 · b. ~1907 · 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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03674-00645)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Josephine Orange | 20 | Daughter | New Worker | Pennsylvania |
| 2 | Augusta Orange | 18 | Son | New Worker | Pennsylvania |
| 3 | Antoinette Orange | 17 | Daughter | New Worker | Pennsylvania |
| 4 | Augustine Orange | 15 | Daughter | New Worker | Pennsylvania |
| 5 | Matilda Orange | 12 | Son | — | Pennsylvania |
| 6 | Girolama Orange | 3 | Daughter | — | Pennsylvania |
| 7 | George Kraus | 68 | Head | Painter | Pennsylvania |
| 8 | George J. Green | 58 | Head | Attendant | Pennsylvania |
| 9 | Mary Green | 57 | Wife | — | Pennsylvania |
| 10 | Gilbert Green | 25 | Son | Spring Maker | Pennsylvania |
| 11 | Ruth Green | 16 | Daughter | — | Pennsylvania |
| 12 | Oscar Helbling | 54 | Head | Laborer | Pennsylvania |
| 13 | Ida Helbling | 51 | Wife | — | Pennsylvania |
| 14 | Harold Helbling | 28 | Son | Springer | Pennsylvania |
| 15 | Howard Helbling | 22 | Son | Machinery | Pennsylvania |
| 16 | Ralph Helbling | 10 | Son | Auto Mechanic | Pennsylvania |
| 17 | Elinor Helbling | 18 | Daughter | Packing | Pennsylvania |
| 18 | Arcadia Helbling | 17 | Son | New Worker | Pennsylvania |
| 19 | Dorothy Helbling | 16 | Daughter | — | Pennsylvania |
| 20 | Lawrence Helbling | 14 | Son | — | Pennsylvania |
| 21 | Ida C. Helbling | 13 | Daughter | — | Pennsylvania |
| 22 | Mary Helbling | 11 | Daughter | — | Pennsylvania |
| 23 | Bertha Helbling | 10 | Daughter | — | Pennsylvania |
| 24 | James Helbling | 6 | Son | — | Pennsylvania |
| 25 | Nelle Hare | 41 | Head | — | Pennsylvania |
| 26 | Albert Harley | 23 | Son | Laborer | Pennsylvania |
| 27 | Carl Perry | 27 | Son in law | Candy Maker | Pennsylvania |
| 28 | Catherine Perry | 20 | Daughter | — | Pennsylvania |
| 29 | Marcie Perry | 2 | Granddaughter | — | Pennsylvania |
| 30 | Raymond Gallagher | 42 | Lodger | Pressman | Illinois |
| 31 | Edward Bergman | 57 | Head | Flower Salesman | Pennsylvania |
| 32 | Henry Bergman | 53 | Brother | Furnace Man | Pennsylvania |
| 33 | Charles Bergman | 52 | Brother | Helper | Pennsylvania |
| 34 | Elva Bergman | 48 | Sister | — | Pennsylvania |
| 35 | Helmut Dieter | 35 | Head | Steel Engraver | Germany |
| 36 | Louise Dieter | 35 | Wife | — | Germany |
| 37 | Charles Dieter | 10 | Son | — | Pennsylvania |
| 38 | Ralph Thomas THIS PERSON | 33 | Head | Carpenter | Pennsylvania |
| 39 | Lillian Thomas | 30 | Wife | — | Pennsylvania |
| 40 | June Thomas | 7 | Daughter | — | Pennsylvania |
Pedigree Summary
Ralph
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)