RT
Robert Thompson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Robert Thompson across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Mary & John — first a head (b.~1909), then head of a 3-person household.
Age 31
b. ~1909
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Thompson |
| Given Name | Robert V. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Coraopolis |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Dentist |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 118 |
| Highest Grade | C-5 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Dentist |
| Township / Ward | Moon Twp |
| Est. Birth Year | ~1909 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Jean Thompson | Daughter | — | ~1940 | |
| Robert Thompson | Head | — | 31 | ~1909 |
| Jean Thompson | Spouse | — | 30 | ~1910 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 11
Allegheny, Pennsylvania · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Robert M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 21
Allegheny, Pennsylvania · implied b. ~1909 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thompson |
| Given Name | Robert M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Elec. Helper |
| Industry | Elec. Power Plant |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 31
Allegheny-County, Pennsylvania · implied b. ~1909 — 3 household members
| Surname | Thompson |
| Given Name | Robert V. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Coraopolis |
| 1935 Residence (County) | Allegheny |
| Occupation | Dentist |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 118 |
| Highest Grade | C-5 |
| 1935 Residence | Pennsylvania |
| 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 Robert Thompson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Dermarsh (~0.92 confidence) and father John Thompson (~0.92 confidence) and mother Daisy Thompson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Dermarsh
b. ~1856
Source mother
● Household
· direct · ~0.92
Father
John Thompson
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Daisy Thompson
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Thompson
Head · 1940 · age 31 · b. ~1909 · 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-t0627-03411-00271)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Forkerlie | 26 | Head | Salesman | Pennsylvania |
| 2 | Caroline Forkerlie | 1 | Daughter | — | Pennsylvania |
| 3 | Joseph Semerad | 33 | Head | Repairman | Czechoslovakia |
| 4 | Ida Semerad | 26 | Wife | — | Pennsylvania |
| 5 | Lola M. Semerad | 3 | Daughter | — | Pennsylvania |
| 6 | J. F. Butler | 65 | Head | Municipal Engineer | Pennsylvania |
| 7 | Ida S. Butler | 64 | Wife | — | Pennsylvania |
| 8 | Robert E. Johnston | 31 | Head | Brakeman | Pennsylvania |
| 9 | Cecilia Johnston | 29 | Wife | — | Pennsylvania |
| 10 | Robert E. Jr. Johnston | 8 | Son | — | Pennsylvania |
| 11 | Barbara J. Johnston | 5 | Daughter | — | Pennsylvania |
| 12 | Ernest Bradish | 42 | Head | Draughtsman | Ohio |
| 13 | Ida Bradish | 44 | Wife | — | Ohio |
| 14 | Joe Bradish | 15 | Daughter | — | Ohio |
| 15 | Bryan Bradish | 14 | Son | — | Ohio |
| 16 | Ada Miller | 31 | Head | Salesman | Pennsylvania |
| 17 | Catherine Miller | 28 | Wife | — | Pennsylvania |
| 18 | Paul Padgett | 24 | Head | Clerk | Pennsylvania |
| 19 | Isabel Padgett | 24 | Wife | — | Pennsylvania |
| 20 | Paul Jr. Padgett | 0 | Son | — | Pennsylvania |
| 21 | Robert L. Fleming | 26 | Head | Machinist | Pennsylvania |
| 22 | Marie Fleming | 23 | Wife | — | Pennsylvania |
| 23 | Judy Ann Fleming | 2 | Daughter | — | Pennsylvania |
| 24 | Gilbert H. Atwood | 42 | Head | Chief Draftsman | Massachusetts |
| 25 | Janice Atwood | 42 | Wife | — | Massachusetts |
| 26 | Richard B. Atwood | 11 | Son | — | Massachusetts |
| 27 | Robert V. Thompson THIS PERSON | 31 | Head | Dentist | Pennsylvania |
| 28 | Jean Thompson | 30 | Wife | — | Pennsylvania |
| 29 | Jean Thompson | 0 | Daughter | — | Pennsylvania |
| 30 | James Nagel | 52 | Head | Asst. Supt. | Michigan |
| 31 | Alice Nagel | 49 | Wife | — | England |
| 32 | Mary J. Mckee | 73 | Head | — | Pennsylvania |
| 33 | Veda M. Mckee | 48 | Daughter | Teacher | Pennsylvania |
| 34 | Lois C. Mckee | 19 | Daughter | Electrician | Pennsylvania |
| 35 | Clarence Truman | 43 | Head | — | Pennsylvania |
| 36 | Eula Truman | 39 | Wife | — | Pennsylvania |
| 37 | George Omlar | 34 | Head | Clerk-Asst. | Pennsylvania |
| 38 | Anna Omlar | 26 | Wife | — | Pennsylvania |
| 39 | Robert H. Omlar | 1 | Son | — | Pennsylvania |
| 40 | Homer R. Logan | 58 | Head | Engineer | Kansas |
Pedigree Summary
Robert
Gen 1 · 3 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)