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Thomas Alexander — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Pennsylvania
Our Model Tree links this Thomas Alexander across the 1920, 1930 and 1940 US Censuses in Washington-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents George & Agnes — first a son (b.~1912), then head of a 7-person household.
Age 28
b. ~1912
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Pennsylvania |
| Surname | Alexander |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Donora Boro |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | Fireman |
| Industry | Boiler House |
| Class of Worker | PW |
| Hours Worked | 6 |
| Income (1939) | 200 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Fireman |
| Township / Ward | Donora Boro |
| Est. Birth Year | ~1912 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thomas | Age | Birth yr |
|---|---|---|---|---|
| James Alexander | Son | — | 23 | ~1917 |
| Robert Alexander | Son | — | 18 | ~1922 |
| George Alexander | Son | — | 25 | ~1915 |
| Agnes Alexander | Daughter | — | 10 | ~1930 |
| George Alexander | Head | — | 62 | ~1878 |
| Agnes Alexander | Spouse | — | 53 | ~1887 |
| Thomas Alexander | Son | — | 28 | ~1912 |
Census Appearances
1920
Washington, Pennsylvania
Son, age 7
Washington, Pennsylvania · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | Thomas |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Mother Tongue | Scotch |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Washington, Pennsylvania
Son, age 18
Washington, Pennsylvania · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | Thomas |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Washington-County, Pennsylvania
Son, age 28
Washington-County, Pennsylvania · implied b. ~1912 — 7 household members
| Surname | Alexander |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Donora Boro |
| 1935 Residence (County) | Washington |
| Occupation | Fireman |
| Industry | Boiler House |
| Class of Worker | PW |
| Hours Worked | 6 |
| Income (1939) | 200 |
| Highest Grade | H-4 |
| 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 Thomas Alexander across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Alexander (~0.92 confidence) and mother Agnes Alexander (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Alexander
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Agnes Alexander
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Alexander
Son · 1940 · age 28 · b. ~1912 · Pennsylvania
★ You are viewing this record
Sibling
George Alexander
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Alexander
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Alexander
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Alexander
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Washington-County, Pennsylvania
Open full size
1940 US Federal Census — Washington-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03622-00679)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Fowler | 17 | Son | — | Pennsylvania |
| 2 | Shirley Fowler | 14 | Daughter | — | Pennsylvania |
| 3 | Ellen Fowler | 5 | Daughter | — | Pennsylvania |
| 4 | William Fowler | 3 | Son | — | Pennsylvania |
| 5 | Helen Ammon | 44 | Head | — | Pennsylvania |
| 6 | Robert Ammon | 27 | Son | Motor Driver | Pennsylvania |
| 7 | Cornelius Ammon | 21 | Son | Shipping-Checker | Pennsylvania |
| 8 | Jack Ammon | 20 | Son | Stockroom-Clerk | Pennsylvania |
| 9 | Ruth Ammon | 12 | Daughter | — | Pennsylvania |
| 10 | Virginia Ammon | 15 | Daughter | — | Pennsylvania |
| 11 | Donald Ammon | 13 | Son | — | Pennsylvania |
| 12 | George Alexander | 62 | Head | Pipe-Fitter | Scotland |
| 13 | Agnes Alexander | 53 | Wife | — | Scotland |
| 14 | Thomas Alexander THIS PERSON | 28 | Son | Fireman | Pennsylvania |
| 15 | George Jr. Alexander | 25 | Son | Cinder Pitman | Pennsylvania |
| 16 | James Alexander | 23 | Son | Utility Man | Pennsylvania |
| 17 | Robert Alexander | 18 | Son | — | Pennsylvania |
| 18 | Agnes Alexander | 10 | Daughter | — | Pennsylvania |
| 19 | George Petrus | 51 | Head | Proprietor | Austria |
| 20 | Marie Petrus | 43 | Wife | — | New Jersey |
| 21 | George Jr. Petrus | 29 | Son | Truck Driver | Pennsylvania |
| 22 | Thomas C. Petrus | 26 | Son | Truck Driver | Pennsylvania |
| 23 | William B. Petrus | 24 | Son | Laborer | Pennsylvania |
| 24 | Franklin Mcbride | 32 | Head | Store Manager | Virginia |
| 25 | Thelma Mcbride | 31 | Wife | — | West Virginia |
| 26 | David Mcbride | 9 | Son | — | Pennsylvania |
| 27 | Donna Mcbride | 7 | Daughter | — | Pennsylvania |
| 28 | Jennie Hamilton | 75 | Mother-in-law | — | Pennsylvania |
| 29 | Harry Lowstetter | 52 | Head | Electric Repairman | Pennsylvania |
| 30 | Adeline Lowstetter | 37 | Wife | — | West Virginia |
| 31 | Naomi Lowstetter | 13 | Daughter | — | Pennsylvania |
| 32 | Doris Mae Lowstetter | 10 | Daughter | — | Pennsylvania |
| 33 | Franklin A. Lowstetter | 4 | Son | — | Pennsylvania |
| 34 | Asa Kline | 40 | Head | Yard Clerk | Pennsylvania |
| 35 | Helen Kline | 38 | Wife | — | Pennsylvania |
| 36 | Jean Kline | 18 | Daughter | — | Pennsylvania |
| 37 | Walter Kline | 15 | Son | — | Pennsylvania |
| 38 | Alex Bette | 36 | Head | Die Reamer | Michigan |
| 39 | Mary Bette | 38 | Wife | — | Hungary |
| 40 | Alex Jr. Bette | 15 | Son | — | Pennsylvania |
Related Census Records
Pedigree Summary
Thomas + 4 siblings
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)