HT
Harry Thomas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Harry Thomas across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Harry & Emma — first a head (b.~1902), then head of a 6-person household.
Age 38
b. ~1902
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Thomas |
| Given Name | Harry W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pitcairn |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | brakeman |
| Industry | steam railroad |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 1314 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Brakeman |
| Township / Ward | Pitcairn |
| Est. Birth Year | ~1902 |
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 Harry | Age | Birth yr |
|---|---|---|---|---|
| Elda Thomas | Daughter | — | 7 | ~1933 |
| Donna Thomas | Daughter | — | 14 | ~1926 |
| Harry Thomas | Head | — | 38 | ~1902 |
| Harry Thomas | Son | — | 16 | ~1924 |
| Russell Thomas | Son | — | 12 | ~1928 |
| Elda Thomas | Spouse | — | 36 | ~1904 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 17
Allegheny, Pennsylvania · implied b. ~1903 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Harry W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Wireman |
| Industry | Electrical work |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Head, age 28
Allegheny, Pennsylvania · implied b. ~1902 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Harry W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 20 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Brakeman |
| Industry | Steam Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 4200 |
| Radio Set | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 38
Allegheny-County, Pennsylvania · implied b. ~1902 — 6 household members
| Surname | Thomas |
| Given Name | Harry W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pitcairn |
| 1935 Residence (County) | Allegheny |
| Occupation | brakeman |
| Industry | steam railroad |
| Class of Worker | PW |
| Hours Worked | 24 |
| Income (1939) | 1314 |
| Highest Grade | No 8 |
| 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 Harry Thomas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Thomas (~0.92 confidence) and mother Emma Thomas (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Thomas
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Emma Thomas
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Thomas
Head · 1940 · age 38 · b. ~1902 · 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
13 people indexed on this census page (nara:1940:m-t0627-03415-00176)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Christine Mccurdy | 25 | Wife | — | Pennsylvania |
| 42 | Harry Mccurdy | 6 | Son | — | Pennsylvania |
| 43 | Nellie Mccurdy | 3 | Daughter | — | Pennsylvania |
| 44 | George Mccurdy | 2 | Son | — | Pennsylvania |
| 45 | Harry W Thomas THIS PERSON | 38 | Head | Brakeman | Pennsylvania |
| 46 | Elda Thomas | 36 | Wife | — | Pennsylvania |
| 47 | Harry Thomas | 16 | Son | — | Pennsylvania |
| 48 | Donna Thomas | 14 | Daughter | — | Pennsylvania |
| 49 | Russell Thomas | 12 | Son | — | Pennsylvania |
| 50 | Elda Thomas | 7 | Daughter | — | Pennsylvania |
| 51 | James H Trainor | 58 | Head | Owner Operator | Pennsylvania |
| 52 | Catherine Trainor | 60 | Sister | — | Pennsylvania |
| 53 | Francis Trainor | 63 | Brother | — | Pennsylvania |
Pedigree Summary
Harry
Gen 1 · 2 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)