TJ
Thomas Johnston — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hamilton-County, Ohio
Our Model Tree links this Thomas Johnston across the 1910, 1920, 1930 and 1940 US Censuses in Hamilton-County, Ohio (XGBoost, ~Confirmed), with identified parents Thomas & Mason — first a head (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Male
Head
Born: Ohio
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Hamilton-County, Ohio |
| Surname | Johnston |
| Given Name | Thomas Jr. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Cincinnati |
| 1935 Residence (County) | Hamilton |
| Additional Details | |
| Occupation | Draftsman |
| Industry | Metal Sales |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Draftsman |
| Township / Ward | Cincinnati |
| Est. Birth Year | ~1910 |
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 |
|---|---|---|---|---|
| Ronald Johnston | Son | — | 4 | ~1936 |
| Mildred Johnston | Spouse | — | 32 | ~1908 |
| Thomas Johnston | Head | — | 30 | ~1910 |
Census Appearances
1910
Hamilton, Ohio
Son, age 1
Hamilton, Ohio · implied b. ~1909 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Thomas Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Kentucky |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1920
Hamilton, Ohio
Son, age 10
Hamilton, Ohio · implied b. ~1910 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Thomas N |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Kentucky |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Hamilton, Ohio
Son, age 20
Hamilton, Ohio · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Thomas Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Kentucky |
| Occupation | Draftsman |
| Industry | Engineers |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Hamilton-County, Ohio
Head, age 30
Hamilton-County, Ohio · implied b. ~1910 — 3 household members
| Surname | Johnston |
| Given Name | Thomas Jr. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Ohio |
| 1935 Residence (City) | Cincinnati |
| 1935 Residence (County) | Hamilton |
| Occupation | Draftsman |
| Industry | Metal Sales |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same Place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Johnston (~0.92 confidence) and father Mason Johnston (~0.92 confidence) and father Thomas Johnston (~0.92 confidence) and mother Jean Johnston (~0.92 confidence) and mother Pearl Johnston (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Johnston
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Mason Johnston
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Thomas Johnston
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Jean Johnston
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Pearl Johnston
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Johnston
Head · 1940 · age 30 · b. ~1910 · Ohio
★ 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 — Hamilton-County, Ohio
Open full size
1940 US Federal Census — Hamilton-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03188-00777)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Relena Macbrien | 85 | Mother | — | Ohio |
| 42 | Archibald Macbrien | 52 | Son | Punch Press Op. | Ohio |
| 43 | Walter Johnson | 54 | Head | Laborer | Kentucky |
| 44 | Lucille Johnson | 57 | Wife | — | Indiana |
| 45 | William L. Pooler | 24 | Head | Salesman | Ohio |
| 46 | Alma Pooler | 22 | Wife | — | Tennessee |
| 47 | Thomas Gannon | 43 | Head | Stock Checker | Irish Free State |
| 48 | Margaret Gannon | 35 | Wife | — | Irish Free State |
| 49 | Mary Gannon | 13 | Daughter | — | Ohio |
| 50 | Thomas Gannon | 11 | Son | — | Ohio |
| 51 | James Gannon | 9 | Son | — | Ohio |
| 52 | John Gannon | 1 | Son | — | Ohio |
| 53 | Thomas Jr. Johnston THIS PERSON | 30 | Head | Draftsman | Ohio |
| 54 | Mildred Johnston | 32 | Wife | — | Kentucky |
| 55 | Ronald Johnston | 4 | Son | — | Ohio |
| 56 | Rudolph Stovall | 60 | Head | Supervisor | Illinois |
| 57 | Mathilda Stovall | 53 | Wife | — | Kentucky |
| 58 | Frieda Brunner | 43 | Head | — | Ohio |
| 59 | Alice Brunner | 13 | Daughter | — | Indiana |
| 60 | Ruth Brunner | 10 | Daughter | — | Indiana |
| 61 | Artie Brunner | 9 | Daughter | — | New Jersey |
| 62 | Ronald Brunner | 6 | Son | — | Pennsylvania |
| 63 | Mrs. Emma Buck | 73 | Head | — | Ohio |
| 64 | Esther Buck | 45 | Daughter | Stenographer | Ohio |
| 65 | Herbert Wolff | 30 | Head | Welder | Ohio |
| 66 | Ruth Wolff | 25 | Wife | — | Ohio |
| 67 | Louis Deimal | 73 | Head | — | Ohio |
| 68 | Louis Wolff | 53 | Nephew | Machinist | Kentucky |
| 69 | Donald Scally | 31 | Head | Supt. Construction | Ohio |
| 70 | Mildred Scally | 28 | Wife | — | Pennsylvania |
| 71 | Richard Scally | 1 | Son | — | Ohio |
| 72 | Frank Lutz | 26 | Head | Drill Operator | Ohio |
| 73 | Virginia Lutz | 23 | Wife | — | Ohio |
| 74 | Gilbert Kriegel | 36 | Head | Machinist | Ohio |
| 75 | Helen Kriegel | 35 | Wife | — | Ohio |
| 76 | Mary Louise Kriegel | 12 | Daughter | — | Ohio |
| 77 | Alice Marie Kriegel | 10 | Daughter | — | Ohio |
| 78 | Frank L. Randolph | 70 | Head | — | Ohio |
| 79 | Flora B. Randolph | 67 | Wife | — | Ohio |
| 80 | Shirley Bradfield | 33 | Head | Machinist | Indiana |
Pedigree Summary
Thomas
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)