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Robert Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Robert Johnson across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Frank & Robert — first a son (b.~1904), then head of a 8-person household.
Age 36
b. ~1904
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Johnson |
| Given Name | Robert S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Truck driver |
| Industry | Wholesale Oil |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 420 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Truck Driver |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1904 |
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 |
|---|---|---|---|---|
| Margaret Johnson | Daughter | — | 25 | ~1915 |
| Isabelle Graham | Daughter | — | 34 | ~1906 |
| Frank Johnson | Head | — | 68 | ~1872 |
| Thomas Graham | Other | — | 1 | ~1939 |
| Thomas Graham | Other | — | 41 | ~1899 |
| Robert Johnson | Son | — | 36 | ~1904 |
| Morris Johnson | Son | — | 27 | ~1913 |
| Bella Johnson | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 16
Middlesex, Massachusetts · implied b. ~1904 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Robert M. Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Vermont |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 26
Middlesex, Massachusetts · implied b. ~1904 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Robert M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Colorado |
| Mother's Birthplace | Vermont |
| Occupation | Salesman |
| Industry | Cigarettes |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 36
Middlesex-County, Massachusetts · implied b. ~1904 — 8 household members
| Surname | Johnson |
| Given Name | Robert S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville City |
| 1935 Residence (County) | Middlesex |
| Occupation | Truck driver |
| Industry | Wholesale Oil |
| Class of Worker | PW |
| Hours Worked | 16 |
| Income (1939) | 420 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Frank Johnson (~0.92 confidence) and father Robert Johnson (~0.92 confidence) and mother Sarah Johnson (~0.92 confidence) and mother Sarah Johnson (~0.92 confidence) and mother Bella Johnson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Johnson
b. ~1872
Source father
● Household
· direct · ~0.92
Father
Robert Johnson
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Sarah Johnson
b. ~1874
Source mother
● Household
· direct · ~0.92
Mother
Sarah Johnson
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Bella Johnson
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Johnson
Son · 1940 · age 36 · b. ~1904 · Massachusetts
★ You are viewing this record
Sibling
Margaret Johnson
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isabelle Graham
Sibling · 1940 · age 34
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Morris Johnson
Sibling · 1940 · age 27
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01705-00506)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Walter Harrington | 70 | Head | — | Massachusetts |
| 42 | Alice D Harrington | 32 | Daughter | Seamstress | Massachusetts |
| 43 | Frank Johnson | 68 | Head | Salesman | Eire |
| 44 | Bella Johnson | 57 | Wife | — | Eire |
| 45 | Robert S Johnson THIS PERSON | 36 | Son | Truck Driver | Massachusetts |
| 46 | Morris Johnson | 27 | Son | Clerk-Cashier | Massachusetts |
| 47 | Margaret E Johnson | 25 | Daughter | Clerk | Massachusetts |
| 48 | Isabelle Graham | 34 | Daughter | — | Massachusetts |
| 49 | Thomas J Graham | 41 | Son-in-law | Manufacturer | Eire |
| 50 | Thomas J Graham | 1 | Grandson | — | Massachusetts |
| 51 | Edith Blair | 45 | Head | Housekeeper | England |
| 52 | Elsie Lyon | 43 | Sister | Seamstress | England |
| 53 | Bruce Lyon | 19 | Nephew | Clerk | Massachusetts |
| 54 | Jeanette Gowen | 18 | Daughter | — | Massachusetts |
| 55 | Laura Farnham | 75 | Head | — | Maine |
| 56 | Gladys Farnham | 43 | Daughter | Stenographer | Maine |
| 57 | Dennis J Mahony | 71 | Head | Operator | Eire |
| 58 | Mary T Mahony | 69 | Wife | — | Eire |
| 59 | Thomas F Mahony | 41 | Son | Police Inspector | Massachusetts |
| 60 | Aubrey Romey | 43 | Head | Painter | Massachusetts |
| 61 | Marie Romey | 41 | Wife | Salesgirl | Canada English |
| 62 | George J Thompson | 51 | Head | Carpenter | Massachusetts |
| 63 | Emma A Thompson | 48 | Wife | — | Canada English |
| 64 | Kenneth Thompson | 17 | Son | — | Massachusetts |
| 65 | Russell Thompson | 11 | Son | — | Massachusetts |
| 66 | Florence M Raugler | 70 | Head | — | Canada English |
| 67 | Ford Raugler | 31 | Son | Custodian | Massachusetts |
| 68 | Frances Raugler | 30 | Daughter | Stenographer | Massachusetts |
| 69 | Percy C Copland | 52 | Head | Automobile | Massachusetts |
| 70 | Helen B Copland | 51 | Wife | — | Massachusetts |
| 71 | Agnes H Burton | 57 | Sister-in-law | — | Massachusetts |
| 72 | John E Jr Lydstone | 50 | Head | Pharmacist | Massachusetts |
| 73 | Grace Lydstone | 47 | Wife | — | Massachusetts |
| 74 | John E Iii Lydstone | 22 | Son | New Worker | Massachusetts |
| 75 | Henry E Busteed | 50 | Head | Master Repair | Massachusetts |
| 76 | Margaret H Busteed | 51 | Wife | — | Massachusetts |
| 77 | Paul E Busteed | 16 | Son | — | Massachusetts |
| 78 | Francis B Busteed | 15 | Son | — | Massachusetts |
| 79 | Nathaniel A Busteed | 9 | Son | — | Massachusetts |
| 80 | John B Creelman | 52 | Head | Foreman | Canada English |
Pedigree Summary
Robert + 3 siblings
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)