RT
Robert Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Robert Thomas across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Robert & Robert — first a son (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Thomas |
| Given Name | Robert Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh city |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | C-3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1917 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Thomas | Head | — | 45 | ~1895 |
| Rachel Fritz | Other | — | 74 | ~1866 |
| Robert Thomas | Son | — | 23 | ~1917 |
| Allie Thomas | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 3
Allegheny, Pennsylvania · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Robert P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 13
Allegheny, Pennsylvania · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Robert P |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 23
Allegheny-County, Pennsylvania · implied b. ~1917 — 4 household members
| Surname | Thomas |
| Given Name | Robert Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh city |
| 1935 Residence (County) | Allegheny |
| Income (1939) | 0 |
| Highest Grade | C-3 |
| 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 Robert Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Thomas (~0.92 confidence) and father Robert Thomas (~0.92 confidence) and father Robert Thomas (~0.92 confidence) and mother Alice Thomas (~0.92 confidence) and mother Allie Thomas (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Thomas
b. ~1895
Source father
● Household
· direct · ~0.92
Father
Robert Thomas
b. ~1892
Source father
● Household
· direct · ~0.92
Father
Robert Thomas
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Alice Thomas
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Allie Thomas
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Thomas
Son · 1940 · age 23 · b. ~1917 · 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
39 people indexed on this census page (nara:1940:m-t0627-03675-00029)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 42 | George Sr. Jeffries | 47 | Head | Superintendent | Indiana |
| 43 | Katherine B. Jeffries | 46 | Wife | — | Pennsylvania |
| 44 | George Jr. Jeffries | 20 | Son | Laborer | Pennsylvania |
| 45 | Mary Alice Jeffries | 18 | Daughter | — | Pennsylvania |
| 46 | Robert Jeffries | 14 | Son | — | Pennsylvania |
| 47 | James Jeffries | 12 | Son | — | Pennsylvania |
| 48 | Sarah Jeffries | 10 | Daughter | — | Pennsylvania |
| 49 | Patrick Jeffries | 5 | Son | — | Pennsylvania |
| 50 | Martin Jeffries | 3 | Son | — | Pennsylvania |
| 51 | Leverett Lowry | 56 | Head | Salesman | Pennsylvania |
| 52 | Bertha Lowry | 55 | Wife | — | Pennsylvania |
| 53 | Robert P. Lucher | 46 | Head | Designing Eng. | West Virginia |
| 54 | Alice Lucher | 32 | Wife | — | Kansas |
| 55 | Robert D. Lucher | 9 | Son | — | Oklahoma |
| 56 | Richard P. Lucher | 5 | Son | — | Kansas |
| 57 | Harry Wernert | 55 | Head | Com. Artist | Pennsylvania |
| 58 | Rose Wernert | 54 | Wife | — | Pennsylvania |
| 59 | Helen Wernert | 17 | Daughter | — | Pennsylvania |
| 60 | John Beier | 28 | Head | Salesman | Pennsylvania |
| 61 | Caroline Beier | 30 | Wife | — | Pennsylvania |
| 62 | John Jr. Beier | 5 | Son | — | Pennsylvania |
| 63 | Carol Beier | 2 | Daughter | — | Pennsylvania |
| 64 | Robert Thomas | 45 | Head | Contact Man | Pennsylvania |
| 65 | Allie Thomas | 50 | Wife | — | Pennsylvania |
| 66 | Robert Jr. Thomas THIS PERSON | 23 | Son | — | Pennsylvania |
| 67 | Rachel Fritz | 74 | Mother | — | Pennsylvania |
| 68 | Clarence L. Daugherty | 67 | Head | Preacher | Maryland |
| 69 | Mary Daugherty | 57 | Wife | — | Pennsylvania |
| 70 | Harry J. Buerle | 54 | Head | Elevator Maintenance | Pennsylvania |
| 71 | Lillie M. Buerle | 54 | Wife | — | Pennsylvania |
| 72 | Harry J. Jr. Buerle | 27 | Son | Tendent | Pennsylvania |
| 73 | Michael Pitarri | 42 | Head | Stone Cutter | Italy |
| 74 | Esther Pitarri | 40 | Wife | — | Italy |
| 75 | Aldo Pitarri | 15 | Son | — | Pennsylvania |
| 76 | Rose Pitarri | 11 | Daughter | — | Pennsylvania |
| 77 | Esther Pitarri | 5 | Daughter | — | Pennsylvania |
| 78 | Minnie O. Donatelli | 44 | Head | — | Italy |
| 79 | Frank Donatelli | 24 | Son | — | Pennsylvania |
| 80 | Helen Donatelli | 22 | Daughter | — | Pennsylvania |
Pedigree Summary
Robert
Gen 1 · 5 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)