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 William & Emily — first a head (b.~1878), then head of a 3-person household.
Age 62
b. ~1878
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Thomas |
| Given Name | Harry H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Pharmacist |
| Industry | Drug Retail |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 30 |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Pharmacist |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1878 |
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 Harry | Age | Birth yr |
|---|---|---|---|---|
| Hilda Davidson | Daughter | — | 41 | ~1899 |
| Harry Thomas | Head | — | 62 | ~1878 |
| Charles Davidson | Other | — | 46 | ~1894 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 42
Allegheny, Pennsylvania · implied b. ~1878 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Wales |
| Mother's Birthplace | Pennsylvania |
| Occupation | Druggist |
| Industry | Store |
| Class of Worker | S |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 52
Allegheny, Pennsylvania · implied b. ~1878 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Thomas |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Wales |
| Mother's Birthplace | Pennsylvania |
| Occupation | Druggist |
| Industry | Retail Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 62
Allegheny-County, Pennsylvania · implied b. ~1878 — 3 household members
| Surname | Thomas |
| Given Name | Harry H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh City |
| 1935 Residence (County) | Allegheny |
| Occupation | Pharmacist |
| Industry | Drug Retail |
| Class of Worker | PW |
| Hours Worked | 3 |
| Income (1939) | 30 |
| Highest Grade | C 2 |
| 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 William Thomas (~0.92 confidence) and mother Emily Thomas (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Thomas
b. ~1852
Source father
● Household
· direct · ~0.92
Mother
Emily Thomas
b. ~1858
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Thomas
Head · 1940 · age 62 · b. ~1878 · 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
38 people indexed on this census page (nara:1940:m-t0627-03676-00333)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Emma Gerhold | 29 | Wife | — | Germany |
| 2 | Conrad Gerhold | 10 | Son | — | Pennsylvania |
| 3 | Walter Gerhold | 9 | Son | — | Pennsylvania |
| 4 | Richard Schreiner | 42 | Head | Baker | Germany |
| 5 | Theresa Schreiner | 45 | Wife | — | Germany |
| 6 | Melona Schreiner | 14 | Daughter | — | Germany |
| 7 | Richard Schreiner | 12 | Son | — | Pennsylvania |
| 9 | John Humphreys | 43 | Head | Farmer | Pennsylvania |
| 10 | Marianne Humphreys | 38 | Wife | Teacher | Pennsylvania |
| 11 | Catherine Humphreys | 72 | Head | — | Pennsylvania |
| 12 | Edward Humphreys | 45 | Son | Laborer | Pennsylvania |
| 13 | Anthony Gaier | 37 | Head | Paper Cutter | Pennsylvania |
| 14 | Mary Gaier | 36 | Wife | — | West Virginia |
| 15 | Catherine Gaier | 15 | Daughter | — | Pennsylvania |
| 16 | Dolores Gaier | 12 | Daughter | — | Pennsylvania |
| 17 | Patrick Joyce | 64 | Head | Operator | West Virginia |
| 18 | William V. Joyce | 31 | Son | Bus Driver | West Virginia |
| 19 | Steve Joyce | 27 | Son | Attendant | West Virginia |
| 20 | Rita Joyce | 19 | Daughter | — | Pennsylvania |
| 21 | Arthur Hupe | 45 | Head | Collector | Pennsylvania |
| 22 | Mildred Hupe | 41 | Wife | — | Pennsylvania |
| 23 | Robert Hupe | 20 | Son | Clerk | Pennsylvania |
| 24 | Howard Hupe | 10 | Son | — | Pennsylvania |
| 25 | William Hupe | 7 | Son | — | Pennsylvania |
| 26 | Dorothy Hupe | 5 | Daughter | — | Pennsylvania |
| 27 | William Brown | 65 | Brother-in-law | Laborer | Pennsylvania |
| 28 | Minnie Brown | 62 | Mother-in-law | — | Pennsylvania |
| 29 | George B. Vinlein | 61 | Head | Bookkeeper | Pennsylvania |
| 30 | Rose M. Vinlein | 49 | Wife | — | Pennsylvania |
| 31 | Catherine M. Vinlein | 22 | Daughter | Cashier | Pennsylvania |
| 32 | George Vinlein | 11 | Son | Clerk | Pennsylvania |
| 33 | Harry H. Thomas THIS PERSON | 62 | Head | Pharmacist | Pennsylvania |
| 34 | Charles Davidson | 46 | Son-in-law | Card Maker | Pennsylvania |
| 35 | Hilda Davidson | 41 | Daughter | — | Pennsylvania |
| 36 | Joseph Niedermeier | 51 | Head | Foreman | Pennsylvania |
| 37 | Mary Niedermeier | 46 | Wife | — | Pennsylvania |
| 38 | Jerome Niedermeier | 18 | Son | Gas Attendant | Pennsylvania |
| 40 | Magdalena Hueltzel | 70 | Head | — | Germany |
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)