TJ
Thelma Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Thelma Johnson across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a daughter (b.~1904), then head of a 3-person household.
Age 36
b. ~1904
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Johnson |
| Given Name | Thelma C. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Filing Executive |
| Industry | First National Bank |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 260 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Filing Executive |
| Township / Ward | Medford 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thelma | Age | Birth yr |
|---|---|---|---|---|
| Thelma Johnson | Daughter | — | 36 | ~1904 |
| Anna Johnson | Head | — | 68 | ~1872 |
| Agnes Johnson | Other | — | 42 | ~1898 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 16
Middlesex, Massachusetts · implied b. ~1904 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 26
Middlesex, Massachusetts · implied b. ~1904 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Thelma C. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | filing clerk |
| Industry | Bank |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Daughter, age 36
Middlesex-County, Massachusetts · implied b. ~1904 — 3 household members
| Surname | Johnson |
| Given Name | Thelma C. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Occupation | Filing Executive |
| Industry | First National Bank |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 260 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| 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 Thelma Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Johnson (~0.92 confidence) and father Charles Johnson (~0.92 confidence) and mother Anna Johnson (~0.92 confidence) and mother Anna Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Johnson
b. ~1871
Source father
● Household
· direct · ~0.92
Father
Charles Johnson
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Anna Johnson
b. ~1872
Source mother
● Household
· direct · ~0.92
Mother
Anna Johnson
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thelma Johnson
Daughter · 1940 · age 36 · b. ~1904 · Massachusetts
★ 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 — 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-t0627-01611-00301)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Conchetta Conti | 59 | wife | — | Italy |
| 2 | Arnold Conti | 26 | son | Gymnast | Massachusetts |
| 3 | James Rivele | 29 | son-in-law | Hairdresser | Massachusetts |
| 4 | Viola Rivele | 30 | daughter | — | Massachusetts |
| 5 | James Rivele | 2 | grand-son | — | Massachusetts |
| 6 | Nina Rivele | 20 | daughter-in-law | — | Massachusetts |
| 7 | Carmen Bucci | 37 | head | Plumber | Italy |
| 8 | Ethel K. Bucci | 40 | wife | Social Worker | Massachusetts |
| 9 | Wm H. Smith | 55 | head | Stevedore | Massachusetts |
| 10 | Elizabeth Smith | 54 | wife | — | Massachusetts |
| 11 | William M. Hall | 30 | head | Truck Driver | Massachusetts |
| 12 | Edna Hall | 33 | wife | — | Canada-English |
| 13 | Kenneth L. Hall | 0 | son | — | Massachusetts |
| 14 | Charles J. Clark | 35 | head | Civil Engineer | Massachusetts |
| 15 | Margaret L. Clark | 36 | wife | — | Pennsylvania |
| 16 | Charles B. Clark | 11 | son | — | Massachusetts |
| 17 | Mary L. Clark | 10 | daughter | — | Massachusetts |
| 18 | Edward T. Clark | 8 | son | — | Massachusetts |
| 19 | Margaret L. Clark | 6 | daughter | — | Massachusetts |
| 20 | James P. Clark | 4 | son | — | Massachusetts |
| 21 | Lawrence Clark | 1 | son | — | Massachusetts |
| 22 | Anna M. Johnson | 68 | Head | — | Sweden |
| 23 | Thelma C. Johnson THIS PERSON | 36 | daughter | Filing Executive | Massachusetts |
| 24 | Agnes A. Johnson | 42 | neice | Candy Worker | Massachusetts |
| 25 | Eleanor Cutler | 37 | head | — | Massachusetts |
| 26 | William M. Hartwell | 35 | Head | Machinist | Massachusetts |
| 27 | Mary M. Hartwell | 8 | daughter | — | Massachusetts |
| 28 | William J. Hartwell | 6 | son | — | Massachusetts |
| 29 | Cecilia R. Hartwell | 25 | daughter | Nurse (Registered) | Massachusetts |
| 30 | Francis A. Hartwell | 23 | son | Glass Worker | Massachusetts |
| 31 | Charles S. Keddy | 50 | Head | Carpenter | Canada-English |
| 32 | Ida M. Keddy | 49 | wife | Waitress | Canada-English |
| 33 | Carl W. Keddy | 20 | son | — | Canada-English |
| 34 | Donald Keddy | 17 | son | — | Canada-English |
| 35 | Everett Beard | 29 | roomer | Handicraft | Massachusetts |
| 36 | Mary E. Corbett | 42 | head | Clerk | Massachusetts |
| 37 | Catherine M. Dallahan | 37 | boarder | Service Representative | Massachusetts |
| 38 | Richard D. Pretti | 60 | Head | Salesman Clothes | Italy |
| 39 | Mary Pretti | 57 | wife | — | Italy |
| 40 | Eugenia M. Pretti | 21 | daughter | Typist | Massachusetts |
Pedigree Summary
Thelma
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)