TJ
Thomas Johnston — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Thomas Johnston across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Norwood & Frances — first a head (b.~1916), then head of a 3-person household.
Age 24
b. ~1916
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Johnston |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Asphalt Paving |
| Class of Worker | PW |
| Income (1939) | 1200 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Truck Driver |
| Township / Ward | Pittsburgh |
| Est. Birth Year | ~1916 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Jean Johnston | Spouse | — | 22 | ~1918 |
| Young Johnston | Daughter | — | 1 | ~1939 |
| Thomas Johnston | Head | — | 24 | ~1916 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 7
Allegheny, Pennsylvania · implied b. ~1913 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| 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 16
Allegheny, Pennsylvania · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Thomas |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| 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
Head, age 24
Allegheny-County, Pennsylvania · implied b. ~1916 — 3 household members
| Surname | Johnston |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Truck Driver |
| Industry | Asphalt Paving |
| Class of Worker | PW |
| Income (1939) | 1200 |
| 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 Johnston across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Norwood Johnston (~0.92 confidence) and mother Frances Johnston (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Norwood Johnston
b. ~1865
Source father
● Household
· direct · ~0.92
Mother
Frances Johnston
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Johnston
Head · 1940 · age 24 · b. ~1916 · 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-t0627-03670-00381)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William Reinhardt | 32 | Head | Fireman | Pennsylvania |
| 2 | Barbara Reinhardt | 32 | Wife | — | Pennsylvania |
| 3 | William Reinhardt | 5 | Son | — | Pennsylvania |
| 4 | William J. Saul | 35 | Head | Repairman | Pennsylvania |
| 5 | Anna M. Saul | 33 | Wife | — | Pennsylvania |
| 6 | William J. Saul | 15 | Son | — | Pennsylvania |
| 7 | Richard C. Saul | 10 | Son | — | Pennsylvania |
| 8 | William Saul | 59 | Father | Salesman | Pennsylvania |
| 9 | Emma R. Saul | 58 | Mother | — | Pennsylvania |
| 10 | Robert W. Saul | 23 | Brother | Assembler | Pennsylvania |
| 11 | Bertha Balach | 55 | Head | — | Germany |
| 12 | Albert Balach | 31 | Son | Laborer | Pennsylvania |
| 13 | Edward Balach | 26 | Son | Brakeman | Pennsylvania |
| 14 | Samuel Cope | 39 | Son-in-law | Laborer | Pennsylvania |
| 15 | Elsie Cope | 29 | Daughter | Laborer | Pennsylvania |
| 16 | Edward J. Tober | 70 | Head | Laborer | Germany |
| 17 | Fredericka Tober | 64 | Wife | — | Germany |
| 18 | Helen Tober | 32 | Daughter | — | Pennsylvania |
| 19 | Mathilda Tober | 30 | Daughter | General Servant | Pennsylvania |
| 20 | Jack Tober | 22 | Son | Laborer | Pennsylvania |
| 21 | Thomas Johnston THIS PERSON | 24 | Head | Truck Driver | Pennsylvania |
| 22 | Jean Johnston | 22 | Wife | — | Pennsylvania |
| 23 | Young Judith Johnston | 1 | Daughter | — | Florida |
| 24 | George Malainik | 37 | Head | Manager | Pennsylvania |
| 25 | Margaret S. Malainik | 25 | Wife | — | Pennsylvania |
| 26 | Kenneth Malainik | 3 | Son | — | Pennsylvania |
| 27 | Harry V. Sheflin | 49 | Head | Pump Man | Pennsylvania |
| 28 | Anna Sheflin | 45 | Wife | — | Germany |
| 29 | Thomas B. Mitchell | 41 | Head | Clerk | Pennsylvania |
| 30 | Inez M. Mitchell | 38 | Wife | — | Pennsylvania |
| 31 | Thomas H. Mitchell | 13 | Son | — | Pennsylvania |
| 32 | Anna M. Mitchell | 11 | Daughter | — | Pennsylvania |
| 33 | Leo R. Mitchell | 2 | Son | — | Pennsylvania |
| 34 | Mary C. Mcnany | 71 | Mother-in-law | — | Pennsylvania |
| 35 | Anna S. Mcnany | 68 | Sister-in-law | — | England |
| 36 | Roy S. Mcconnell | 39 | Head | Steam Fitter | Pennsylvania |
| 37 | Eleanor Mcconnell | 37 | Wife | — | Pennsylvania |
| 38 | John A. Mchugh | 52 | Head | Laborer | Pennsylvania |
| 39 | Marie Mchugh | 45 | Wife | Waitress | Pennsylvania |
| 40 | John M. Mchugh | 21 | Son | Assistant Shipper | Pennsylvania |
Pedigree Summary
Thomas
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)