HJ
Harry Johnston — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Harry Johnston across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Grant & Mary — first a head (b.~1901), then head of a 3-person household.
Age 39
b. ~1901
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Johnston |
| Given Name | Harry |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | McKeesport City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | salesman |
| Industry | wholesale canned goods |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1680 |
| Highest Grade | S 8 |
| 1935 Residence | Same house |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Salesman |
| Township / Ward | Mckeesport City |
| Est. Birth Year | ~1901 |
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 |
|---|---|---|---|---|
| Harry Johnston | Head | — | 39 | ~1901 |
| D Johnston | Spouse | — | 38 | ~1902 |
| H Johnston | Son | — | 4 | ~1936 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 19
Allegheny, Pennsylvania · implied b. ~1901 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| 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
Head, age 29
Allegheny, Pennsylvania · implied b. ~1901 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Harry |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 25 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Salesman |
| Industry | Wholesale Drug |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | $23 |
| Radio Set | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Head, age 39
Allegheny-County, Pennsylvania · implied b. ~1901 — 3 household members
| Surname | Johnston |
| Given Name | Harry |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | McKeesport City |
| 1935 Residence (County) | Allegheny |
| Occupation | salesman |
| Industry | wholesale canned goods |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1680 |
| Highest Grade | S 8 |
| 1935 Residence | Same house |
| 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 Johnston across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Grant Johnston (~0.92 confidence) and mother Mary Johnston (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Grant Johnston
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Mary Johnston
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Johnston
Head · 1940 · age 39 · b. ~1901 · 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
39 people indexed on this census page (nara:1940:m-t0627-03409-00257)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Helen Pollock | 37 | daughter | Waitress | Pennsylvania |
| 2 | Robert Pollock | 13 | grandson | — | Pennsylvania |
| 3 | William Pollock | 11 | grandson | — | Pennsylvania |
| 4 | Peter Grainger | 51 | head | Machinist | Scotland |
| 5 | Lottie Grainger | 48 | wife | — | Scotland |
| 6 | W. Gordon Grainger | 20 | son | Asst. Manager | Scotland |
| 7 | Dorothy M. Grainger | 15 | daughter | — | Pennsylvania |
| 8 | Charles Menzies | 56 | head | Clerk | Scotland |
| 9 | Catherine Menzies | 54 | wife | — | Scotland |
| 10 | Anna Menzies | 21 | daughter | Stenographer | Pennsylvania |
| 11 | Harry Johnston THIS PERSON | 39 | head | Salesman | Pennsylvania |
| 12 | D. Mabel Johnston | 38 | wife | — | Pennsylvania |
| 13 | H. Thomas Johnston | 4 | son | — | Pennsylvania |
| 14 | Hubert Widen | 39 | head | Leverman | Sweden |
| 15 | Judith A. Widen | 36 | wife | — | Pennsylvania |
| 16 | Alexander Halaczyki | 37 | head | Machinist | Pennsylvania |
| 17 | Anne Halaczyki | 36 | wife | — | Pennsylvania |
| 18 | Alexander, Jr. Halaczyki | 4 | son | — | Pennsylvania |
| 19 | Mary Ann Halaczyki | 1 | daughter | — | Pennsylvania |
| 20 | Andrew Graham | 39 | head | Rivetter | Scotland |
| 21 | Marion Graham | 40 | wife | — | Scotland |
| 22 | David Graham | 15 | son | — | Pennsylvania |
| 23 | William Graham | 13 | son | — | Pennsylvania |
| 24 | James Young | 23 | head | Salesman | Pennsylvania |
| 25 | Elizabeth Young | 24 | wife | — | Pennsylvania |
| 26 | Joseph Dorn | 40 | head | Laborer | Pennsylvania |
| 27 | Mildred Dorn | 40 | wife | — | Pennsylvania |
| 28 | Grace Dorn | 10 | daughter | — | Pennsylvania |
| 29 | Margaret Dorn | 9 | daughter | — | Pennsylvania |
| 30 | Francis Schill | 52 | head | Oil Man (Laborer) | Pennsylvania |
| 31 | Rose Schill | 44 | wife | — | Pennsylvania |
| 32 | Robert Schill | 20 | son | — | Pennsylvania |
| 33 | Viola Schill | 15 | daughter | — | Pennsylvania |
| 34 | Russel Fickle | 42 | head | Laborer | Virginia |
| 35 | Frances Fickle | 41 | wife | — | Pennsylvania |
| 36 | Catherine Hochevar | 55 | head | — | Hungary |
| 37 | Steven Hochevar | 34 | son | Pipe Cutter | Pennsylvania |
| 38 | Anna Hochevar | 25 | daughter | Housework | Pennsylvania |
| 39 | Michael Hochevar | 21 | son | 60 | Pennsylvania |
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)