RJ
Ruth Johnston — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Ruth Johnston across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents E & Paul — first a daughter (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Johnston |
| Given Name | Ruth E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Fawn Township |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Clerk |
| Industry | Hardware Store |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 600 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Clerk |
| Township / Ward | Fawn Township |
| Est. Birth Year | ~1914 |
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 Ruth | Age | Birth yr |
|---|---|---|---|---|
| Paul Johnston | Head | — | 49 | ~1891 |
| Edith Johnston | Spouse | — | 48 | ~1892 |
| Ruth Johnston | Daughter | — | 26 | ~1914 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 6
Allegheny, Pennsylvania · implied b. ~1914 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Ruth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Year of Naturalization | Yes |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 16
Allegheny, Pennsylvania · implied b. ~1914 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Ruth E. |
| Relationship to Head | Daughter |
| Sex | F |
| 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
Daughter, age 26
Allegheny-County, Pennsylvania · implied b. ~1914 — 3 household members
| Surname | Johnston |
| Given Name | Ruth E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Fawn Township |
| 1935 Residence (County) | Allegheny |
| Occupation | Clerk |
| Industry | Hardware Store |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 600 |
| 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 Ruth Johnston across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father E Johnston (~0.92 confidence) and father Paul Johnston (~0.92 confidence) and father Wilmot Johnston (~0.92 confidence) and mother Edith Johnston (~0.92 confidence) and mother Irene Johnston (~0.92 confidence) and mother Sue Johnston (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
E Johnston
b. ~1872
Source father
● Household
· direct · ~0.92
Father
Paul Johnston
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Wilmot Johnston
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Edith Johnston
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Irene Johnston
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Sue Johnston
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ruth Johnston
Daughter · 1940 · age 26 · b. ~1914 · 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-t0627-03404-00009)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Madeline Digirolamo | 14 | Daughter | — | Pennsylvania |
| 2 | Rosalind Digirolamo | 4 | Daughter | — | Pennsylvania |
| 3 | Francis J. Wilner | 52 | Head | Proprietor | Pennsylvania |
| 4 | Helen M. Wilner | 53 | Wife | Partner | Pennsylvania |
| 5 | Ward Wolf | 35 | Head | Postal Clerk | Pennsylvania |
| 6 | Grace Ida Wolf | 35 | Wife | — | Maine |
| 7 | Ann Marie Wolf | 5 | Daughter | — | Pennsylvania |
| 8 | Thad Brady | 47 | Head | Machinist | Virginia |
| 9 | Fern Brady | 47 | Wife | — | Pennsylvania |
| 10 | Thomas G. Morley | 62 | Head | Checker | England |
| 11 | Zella Morley | 50 | Wife | — | Pennsylvania |
| 12 | William Morley | 25 | Son | Apprentice Registered Pharmacist | Pennsylvania |
| 13 | Lucille Morley | 20 | Daughter | — | Pennsylvania |
| 14 | Marilyn Morley | 15 | Daughter | — | Pennsylvania |
| 15 | Howard L. Miller | 50 | Head | Secretary | Pennsylvania |
| 16 | Irene Miller | 45 | Wife | — | Pennsylvania |
| 17 | Howard Jr. Miller | 21 | Son | Laboratory | Texas |
| 18 | Richard Miller | 19 | Son | Clerk | Pennsylvania |
| 19 | John Miller | 18 | Son | Fryman | Pennsylvania |
| 20 | Barbara Miller | 16 | Daughter | — | Pennsylvania |
| 21 | Paul D. Johnston | 49 | Head | Teacher | Pennsylvania |
| 22 | Edith B. Johnston | 48 | Wife | — | Pennsylvania |
| 23 | Ruth E. Johnston THIS PERSON | 26 | Daughter | Clerk | Pennsylvania |
| 24 | John Hoyle | 57 | Head | Heater | Pennsylvania |
| 25 | Rachel Hoyle | 54 | Wife | — | Pennsylvania |
| 26 | Charles Ayers | 39 | Son | Heater Helper | Pennsylvania |
| 27 | Ethel Ayers | 34 | Daughter | — | Pennsylvania |
| 28 | Clarence Ayers | 11 | Grandson | — | Pennsylvania |
| 29 | Richard Ayers | 5 | Grandson | — | Pennsylvania |
| 30 | Loyal Elliott | 43 | Head | Machinist Helper | Pennsylvania |
| 31 | Laura Elliott | 36 | Wife | — | Pennsylvania |
| 32 | Edwin Elliott | 11 | Son | — | Pennsylvania |
| 33 | Dorothy Elliott | 10 | Daughter | — | Pennsylvania |
| 34 | John Negley | 74 | Head | Carpenter | Pennsylvania |
| 35 | Elizabeth Negley | 50 | Wife | — | Pennsylvania |
| 36 | Bernard Petrach | 23 | Head | Helper | Pennsylvania |
| 37 | Margaret Petrach | 22 | Wife | — | Pennsylvania |
| 38 | Earl H. Hunter | 49 | Head | Machinist | Pennsylvania |
| 39 | Myrtle Hunter | 48 | Wife | — | Pennsylvania |
| 40 | Walter Hunter | 18 | Son | New Worker | Pennsylvania |
Pedigree Summary
Ruth
Gen 1 · 6 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)