RJ
Robert Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Robert Johnson across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents George & Andrew — first a son (b.~1912), then head of a 6-person household.
Age 28
b. ~1912
Male
Son
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Johnson |
| Given Name | Robert H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | DARBY borough |
| 1935 Residence (County) | DELAWARE |
| Additional Details | |
| Occupation | Salesman |
| Industry | Coke Company |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1196 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Salesman |
| Township / Ward | Darby Borough |
| Est. Birth Year | ~1912 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| George Johnson | Head | — | 65 | ~1875 |
| Marion Johnson | Other | — | 23 | ~1917 |
| Albert Johnson | Son | — | 26 | ~1914 |
| Richard Johnson | Son | — | 34 | ~1906 |
| Robert Johnson | Son | — | 28 | ~1912 |
| Susan Johnson | Spouse | — | 63 | ~1877 |
Census Appearances
1920
Delaware, Pennsylvania
Son, age 7
Delaware, Pennsylvania · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Robert E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Delaware, Pennsylvania
Son, age 17
Delaware, Pennsylvania · implied b. ~1913 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | JOHNSON |
| Given Name | ROBERT H |
| Relationship to Head | SON |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | PENNSYLVANIA |
| Father's Birthplace | PENNSYLVANIA |
| Mother's Birthplace | PENNSYLVANIA |
| Occupation | NONE |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Delaware-County, Pennsylvania
Son, age 28
Delaware-County, Pennsylvania · implied b. ~1912 — 6 household members
| Surname | Johnson |
| Given Name | Robert H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | DARBY borough |
| 1935 Residence (County) | DELAWARE |
| Occupation | Salesman |
| Industry | Coke Company |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1196 |
| Highest Grade | H 3 |
| 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 Robert Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Johnson (~0.92 confidence) and father Andrew Johnson (~0.92 confidence) and mother Susan Johnson (~0.92 confidence) and mother Mildred Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Johnson
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Andrew Johnson
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Susan Johnson
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Mildred Johnson
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Johnson
Son · 1940 · age 28 · b. ~1912 · Pennsylvania
★ You are viewing this record
Sibling
Richard Johnson
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Johnson
Sibling · 1940 · age 26
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 — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03490-00618)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eleanor George | 2 | Daughter | — | Pennsylvania |
| 2 | Harry K. M. Kent | 35 | Head | Machinist | Pennsylvania |
| 3 | Mary G. Kent | 33 | Wife | — | Pennsylvania |
| 4 | Mary J. Kent | 10 | Daughter | — | Pennsylvania |
| 5 | Barbara A. Kent | 5 | Daughter | — | Pennsylvania |
| 6 | Ruth E. Kent | 57 | Mother | — | New Jersey |
| 7 | George N. Sr. Lutton | 48 | Head | Salesman | Delaware |
| 8 | Clara A. Lutton | 47 | Wife | — | Pennsylvania |
| 9 | George N. Jr. Lutton | 12 | Son | — | Massachusetts |
| 10 | Hattie E. Young | 50 | Head | — | Germany |
| 11 | Hattie W. Young | 47 | Daughter | Clerk | Pennsylvania |
| 12 | George W. Johnson | 65 | Head | Operator | Pennsylvania |
| 13 | Susan A. Johnson | 63 | Wife | — | Pennsylvania |
| 14 | Richard G. Johnson | 34 | Son | Electrician | Virginia |
| 15 | Albert E. Johnson | 26 | Son | Shipper | Pennsylvania |
| 16 | Robert H. Johnson THIS PERSON | 28 | Son | Salesman | Pennsylvania |
| 17 | Marion Johnson | 23 | Daughter-in-law | Checker | Pennsylvania |
| 18 | Anthony Mature | 44 | Head | Checker | Pennsylvania |
| 19 | Edith Mature | 46 | Wife | — | Pennsylvania |
| 20 | Gertrude Homan | 54 | Sister-in-law | — | Pennsylvania |
| 21 | Mason G. Homan | 35 | Nephew | Inspector | Pennsylvania |
| 22 | Alice M. Homan | 34 | Wife | Clerk Supervising | New Jersey |
| 23 | Charles Hersey | 58 | Head | Mail Carrier | Pennsylvania |
| 24 | Harriet F. Hersey | 52 | Wife | — | Pennsylvania |
| 25 | Enoch P. Hersey | 87 | Father-in-law | — | Pennsylvania |
| 26 | Amelia T. Toland | 64 | Head | — | Pennsylvania |
| 27 | Edward C. Johnston | 45 | Son-in-law | Printer | Illinois |
| 28 | Marion R. Johnston | 20 | Daughter | — | Pennsylvania |
| 29 | Janet R. Johnston | 0 | Granddaughter | — | Pennsylvania |
| 30 | Ruth W. Wagner | 31 | Boarder | Clerk | Pennsylvania |
| 31 | Raymond W. Brown | 25 | Head | Engineer | Canada |
| 32 | Marguerite C. Brown | 25 | Wife | — | Illinois |
| 33 | Harold A. Brown | 3 | Son | — | Pennsylvania |
| 34 | Laura E. Parks | 48 | Head | Lady Housekeeper | Pennsylvania |
| 35 | Robert H. Johnston | 65 | Boarder | Laborer | Illinois |
| 36 | Jennie B. Johnston | 64 | Boarder | — | Pennsylvania |
| 37 | Walter C. Snitcher | 43 | Boarder | Laborer | New Jersey |
| 38 | Ruth F. Snitcher | 38 | Boarder | — | Pennsylvania |
| 39 | Ida M. Snitcher | 2 | Boarder | — | Pennsylvania |
| 40 | Edith Rahbeck | 34 | Boarder | — | Pennsylvania |
Pedigree Summary
Robert + 2 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)