RJ
Robert Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Robert Johnson across the 1920, 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Robert & Robert — first a son (b.~1910), then head of a 8-person household.
Age 30
b. ~1910
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Johnson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Homestead |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Hours Worked | 52 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Homestead |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Catherine Johnson | Daughter | — | 18 | ~1922 |
| Laverne Johnson | Daughter | — | 11 | ~1929 |
| Louise Johnson | Daughter | — | 20 | ~1920 |
| Edith Johnson | Daughter | — | 15 | ~1925 |
| Robert Johnson | Head | — | 65 | ~1875 |
| Robert Johnson | Son | — | 30 | ~1910 |
| Charles Johnson | Son | — | 22 | ~1918 |
| Myrtle Johnson | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Allegheny, Pennsylvania
Son, age 10
Allegheny, Pennsylvania · implied b. ~1910 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Son, age 20
Allegheny, Pennsylvania · implied b. ~1910 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | Dry Cleaning Bus |
| Industry | Clean & Pressed |
| Class of Worker | E |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 30
Allegheny-County, Pennsylvania · implied b. ~1910 — 8 household members
| Surname | Johnson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Homestead |
| 1935 Residence (County) | Allegheny |
| Hours Worked | 52 |
| Highest Grade | Hs 4 |
| 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 Robert Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Johnson (~0.92 confidence) and father Robert Johnson (~0.92 confidence) and father Robert Johnson (~0.92 confidence) and mother Myrtle Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Johnson
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Robert Johnson
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Robert Johnson
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Myrtle Johnson
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Johnson
Son · 1940 · age 30 · b. ~1910 · Pennsylvania
★ You are viewing this record
Sibling
Charles Johnson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Johnson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Louise Johnson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edith Johnson
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Laverne Johnson
Sibling · 1940 · age 11
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 — 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-t0627-03406-00491)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Wendell A Cole | 0 | Grandson | — | Pennsylvania |
| 2 | Sidney Johnson | 15 | Lodger | — | Virginia |
| 3 | John T. Maynor | 26 | Lodger | Salesman | Georgia |
| 4 | Philip Darden | 33 | Head | Janitor | Virginia |
| 5 | Arthur Darden | 31 | Wife | — | Tennessee |
| 6 | Philip Jr. Darden | 10 | Son | — | Pennsylvania |
| 7 | John Brooks | 49 | Head | Laborer | Maryland |
| 8 | Julia Brooks | 43 | Wife | — | Maryland |
| 9 | Atkins Bennett | 48 | Head | Skilled Laborer | South Carolina |
| 10 | Jane Bennett | 41 | Wife | — | South Carolina |
| 11 | Ulysses Bennett | 17 | Nephew | — | South Carolina |
| 12 | Harry Snider | 37 | Head | — | Arkansas |
| 13 | Stella Snider | 16 | Daughter | — | Arkansas |
| 14 | Harry Snider | 14 | Son | — | Pennsylvania |
| 15 | Eddie Snider | 13 | Son | — | Pennsylvania |
| 16 | Oddesa Snider | 11 | Daughter | — | Tennessee |
| 17 | Marcellus Snider | 9 | Daughter | — | Pennsylvania |
| 18 | Tony Snider | 4 | Son | — | Pennsylvania |
| 19 | Antonitte Snider | 2 | Daughter | — | Pennsylvania |
| 20 | Eugene Snider | 0 | Son | — | Pennsylvania |
| 21 | Beatrice Calloway | 32 | Head | — | West Virginia |
| 22 | Lillian Calloway | 14 | Daughter | — | Pennsylvania |
| 23 | Mary Calloway | 13 | Daughter | — | Pennsylvania |
| 24 | Nellie Ford | 47 | Head | — | Virginia |
| 25 | Eugenia Ford | 13 | Daughter | — | Pennsylvania |
| 26 | Edna Ford | 12 | Daughter | — | Pennsylvania |
| 27 | Henry Ford | 8 | Son | — | Pennsylvania |
| 28 | James Wilson | 50 | Head | Laborer | South Carolina |
| 29 | Thelma Wilson | 35 | Wife | — | South Carolina |
| 30 | Jane Wilson | 4 | Daughter | — | Pennsylvania |
| 31 | James Jr. Wilson | 3 | Son | — | Pennsylvania |
| 32 | Fred Houston | 60 | Head | Barber | Indiana |
| 33 | Robert Johnson | 65 | Head | — | Virginia |
| 34 | Myrtle Johnson | 57 | Wife | — | Virginia |
| 35 | Robert Johnson THIS PERSON | 30 | Son | — | Pennsylvania |
| 36 | Charles Johnson | 22 | Son | Laborer | Pennsylvania |
| 37 | Louise Johnson | 20 | Daughter | New Worker | Pennsylvania |
| 38 | Catherine Johnson | 18 | Daughter | — | Pennsylvania |
| 39 | Edith Johnson | 15 | Daughter | — | Pennsylvania |
| 40 | Laverne Johnson | 11 | Daughter | — | Pennsylvania |
Related Census Records
Pedigree Summary
Robert + 5 siblings
Gen 1 · 4 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)