CP
Carl Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Carl Peterson across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1885), then head of a 6-person household.
Age 55
b. ~1885
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Peterson |
| Given Name | Carl H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Belmont Town |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | clerk |
| Industry | Bank |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 3500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Clerk |
| Township / Ward | Belmont Town |
| Est. Birth Year | ~1885 |
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 Carl | Age | Birth yr |
|---|---|---|---|---|
| Edith Peterson | Daughter | — | 18 | ~1922 |
| Jeannette Peterson | Daughter | — | 15 | ~1925 |
| Emine Peterson | Daughter | — | 31 | ~1909 |
| Marilyn Peterson | Daughter | — | 14 | ~1926 |
| Carl Peterson | Head | — | 55 | ~1885 |
| Ruth Peterson | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Middlesex, Massachusetts
Head, age 35
Middlesex, Massachusetts · implied b. ~1885 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Carl H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Auditor |
| Industry | Bank |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Head, age 45
Middlesex, Massachusetts · implied b. ~1885 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Carl H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 23 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Clerk |
| Industry | Bank |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 6000 |
| Radio Set | R |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 55
Middlesex-County, Massachusetts · implied b. ~1885 — 6 household members
| Surname | Peterson |
| Given Name | Carl H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 55 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Belmont Town |
| 1935 Residence (County) | Middlesex |
| Occupation | clerk |
| Industry | Bank |
| Class of Worker | PW |
| Hours Worked | 45 |
| Income (1939) | 3500 |
| Highest Grade | Hs 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 Carl Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Carl Peterson
Head · 1940 · age 55 · b. ~1885 · Massachusetts
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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-t0627-01602-01017)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas J. Herald | 45 | Head | Salesman | New York |
| 2 | Eleanor M. Herald | 50 | Wife | — | New York |
| 3 | John W. Fitzgerald | 59 | Head | President | Massachusetts |
| 4 | Alice Fitzgerald | 55 | Wife | — | Massachusetts |
| 5 | Edith Fitzgerald | 22 | Daughter | Private Secretary | Massachusetts |
| 6 | George E. Keith | 30 | Head | Clergyman | Massachusetts |
| 7 | Beatrice B. Keith | 33 | Wife | — | Massachusetts |
| 8 | Marion Keith | 4 | Daughter | — | Massachusetts |
| 9 | Virginia Keith | 2 | Daughter | — | Massachusetts |
| 10 | Deborah Keith | 0 | Daughter | — | Massachusetts |
| 11 | Walter H. Mclaughlin | 33 | Head | Lawyer | Massachusetts |
| 12 | Alice M. Mclaughlin | 33 | Wife | — | Massachusetts |
| 13 | Walter H. Jr. Mclaughlin | 6 | Son | — | Massachusetts |
| 14 | Robert Mclaughlin | 2 | Son | — | Massachusetts |
| 15 | Cecil Hill | 50 | Head | Tower Director | Rhode Island |
| 16 | Alice Hill | 48 | Wife | — | Canada-English |
| 17 | Pauline Hill | 15 | Daughter | — | Massachusetts |
| 18 | Carl H. Peterson THIS PERSON | 55 | Head | Clerk | Massachusetts |
| 19 | Ruth R. Peterson | 50 | Wife | — | Massachusetts |
| 20 | Emine A. Peterson | 31 | Daughter | Secretary | Massachusetts |
| 21 | Edith C. Peterson | 18 | Daughter | — | Massachusetts |
| 22 | Jeannette Peterson | 15 | Daughter | — | Massachusetts |
| 23 | Marilyn Peterson | 14 | Daughter | — | Massachusetts |
| 24 | Theresa Mcnamara | 56 | Head | — | Canada-English |
| 25 | Mary Mcnamara | 28 | Daughter | Clerk | Massachusetts |
| 26 | Gertrude Mcnamara | 25 | Daughter | Clerk | Massachusetts |
| 27 | Margaret Mcnamara | 22 | Daughter | Clerk | Massachusetts |
| 28 | Olof Johnson | 41 | Head | Accountant | Sweden |
| 29 | Constance Johnson | 35 | Wife | — | Canada-English |
| 30 | Johanna Johnson | 5 | Daughter | — | Canada-English |
| 31 | Albert S. Whiting | 62 | Head | Salesman | Massachusetts |
| 32 | Jessie C. Whiting | 56 | Wife | — | Massachusetts |
| 33 | Richard A. Whiting | 17 | Son | — | Massachusetts |
| 34 | Willard H. Sprague | 63 | Head | Vice-President | Massachusetts |
| 35 | Sarah H. Sprague | 63 | Wife | — | Maine |
| 36 | Esther Wood | 29 | Cousin | Clerk | Maine |
| 37 | Mary E. Hilton | 50 | Head | Teacher | Maine |
| 38 | Annette S. Hilton | 85 | Mother | — | Maine |
| 39 | Franklin H. Abbott | 52 | Head | Salesman | Massachusetts |
| 40 | Lillian A. Abbott | 52 | Wife | — | Massachusetts |
Related Census Records
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)