CP
Clarence Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Worcester-County, Massachusetts
Our Model Tree links this Clarence Peterson across the 1920, 1930 and 1940 US Censuses in Worcester-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Peter & Peter — first a head (b.~1906), then head of a 5-person household.
Age 34
b. ~1906
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Worcester-County, Massachusetts |
| Surname | Peterson |
| Given Name | Clarence |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Worcester City |
| 1935 Residence (County) | Worcester |
| Additional Details | |
| Occupation | Doctor |
| Industry | Dentist |
| Class of Worker | OA |
| Hours Worked | 45 |
| Income (1939) | 3200 |
| Highest Grade | C 4 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Doctor |
| Township / Ward | Worcester City |
| Est. Birth Year | ~1906 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Clarence | Age | Birth yr |
|---|---|---|---|---|
| Mary Hickey | Other | — | 17 | ~1923 |
| Clarence Peterson | Head | — | 34 | ~1906 |
| Joan Peterson | Daughter | — | 4 | ~1936 |
| Carol Peterson | Daughter | — | 3 | ~1937 |
| Ethel Peterson | Spouse | — | 28 | ~1912 |
Census Appearances
1920
Worcester, Massachusetts
Son, age 14
Worcester, Massachusetts · implied b. ~1906 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Clarence E. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Worcester, Massachusetts
Son, age 24
Worcester, Massachusetts · implied b. ~1906 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Clarence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Dentist |
| Industry | Dentistry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Worcester-County, Massachusetts
Head, age 34
Worcester-County, Massachusetts · implied b. ~1906 — 5 household members
| Surname | Peterson |
| Given Name | Clarence |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Worcester City |
| 1935 Residence (County) | Worcester |
| Occupation | Doctor |
| Industry | Dentist |
| Class of Worker | OA |
| Hours Worked | 45 |
| Income (1939) | 3200 |
| Highest Grade | C 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 Clarence Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Peter Peterson (~0.92 confidence) and father Peter Peterson (~0.92 confidence) and mother Hannah Peterson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Peter Peterson
b. ~1859
Source father
● Household
· direct · ~0.92
Father
Peter Peterson
b. ~1859
Source father
● Household
· direct · ~0.92
Mother
Hannah Peterson
b. ~1861
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Clarence Peterson
Head · 1940 · age 34 · b. ~1906 · 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 — Worcester-County, Massachusetts
Open full size
1940 US Federal Census — Worcester-County, Massachusetts
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01719-00564)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Hattie Kohring | 80 | Head | — | New York |
| 2 | Sydney Rhodes | 58 | Head | Draftsman | Massachusetts |
| 3 | Anne Rhodes | 58 | Wife | — | Massachusetts |
| 4 | Ann Rhodes | 21 | Daughter | — | Massachusetts |
| 5 | Everett Horne | 40 | Head | Engineer | Massachusetts |
| 6 | Gertrude Horne | 35 | Wife | — | Massachusetts |
| 7 | Judith Horne | 2 | Daughter | — | Massachusetts |
| 8 | Leonard Rogers | 58 | In law | Fireman | Massachusetts |
| 9 | Mary T. O'Brien Riley | 69 | Mother | — | Scotland |
| 10 | Mary E. O'Brien | 39 | Head | School Teacher | Massachusetts |
| 11 | Charles Lawton | 61 | Head | Engraver | Massachusetts |
| 12 | Ellen Lawton | 57 | Wife | — | Massachusetts |
| 13 | Louis Brega | 34 | Head | Inspector | Massachusetts |
| 14 | Dorothy Brega | 32 | Wife | — | Massachusetts |
| 15 | David Mcclary | 54 | Head | Buyer | Canada |
| 16 | Emily Mcclary | 55 | Wife | — | Massachusetts |
| 17 | Margaret Mcclary | 18 | Daughter | — | Massachusetts |
| 18 | Enid Mcclary | 11 | Daughter | — | Massachusetts |
| 19 | Carl Benson | 59 | Brother in law | Mailman | Denmark |
| 20 | Clarence Peterson THIS PERSON | 34 | Head | Doctor | Massachusetts |
| 21 | Ethel Peterson | 28 | Wife | — | Massachusetts |
| 22 | Joan Peterson | 4 | Daughter | — | Massachusetts |
| 23 | Carol Peterson | 3 | Daughter | — | Massachusetts |
| 24 | Mary Hickey | 17 | Servant | Domestic | Massachusetts |
| 25 | Kenric Bird | 50 | Head | Salesman | Connecticut |
| 26 | Irene Bird | 49 | Wife | — | Connecticut |
| 27 | Robert Bird | 19 | Son | — | Connecticut |
| 28 | Irving Taylor | 46 | Head | Salesman | Massachusetts |
| 29 | Helen Taylor | 37 | Wife | — | Massachusetts |
| 30 | Oliver Stansfield | 50 | Head | Salesman | England |
| 31 | Ruth Stansfield | 51 | Wife | — | England |
| 32 | Ruth Stansfield | 21 | Daughter | — | England |
| 33 | John Stansfield | 18 | Son | — | Mass. |
| 34 | Oliver Stansfield | 5 | Son | — | Mass. |
| 35 | James Mitchell | 60 | Head | Manager | Scotland |
| 36 | Jessie Mitchell | 87 | Mother | — | Scotland |
| 37 | Andrew Howorth | 38 | Brother in law | Clerk | Massachusetts |
| 38 | Marion Howorth | 30 | Sister | — | Massachusetts |
| 39 | Maria Howorth | 9 | Niece | — | Massachusetts |
Pedigree Summary
Clarence
Gen 1 · 3 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)