EP
Ernest Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Ernest Peterson across the 1910, 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Frank & Oscar — first a head (b.~1891), then head of a 4-person household.
Age 49
b. ~1891
Male
Head
Born: Connecticut
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Peterson |
| Given Name | Ernest B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Connecticut |
| 1935 Residence (City) | Malden (city) |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Clerk |
| Industry | Post-Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 2100 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
| Occupation | Clerk |
| Township / Ward | Malden City |
| Est. Birth Year | ~1891 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Ernest | Age | Birth yr |
|---|---|---|---|---|
| Olga Peterson | Spouse | — | 42 | ~1898 |
| Eleanor Peterson | Daughter | — | 18 | ~1922 |
| Ruth Peterson | Daughter | — | 14 | ~1926 |
| Ernest Peterson | Head | — | 49 | ~1891 |
Census Appearances
1910
Middlesex, Massachusetts
Son, age 19
Middlesex, Massachusetts · implied b. ~1891 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Ernest |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Connecticut |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Stenographer |
| Industry | Extracts office |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
1920
Middlesex, Massachusetts
Son, age 27
Middlesex, Massachusetts · implied b. ~1893 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Ernest B. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Connecticut |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Clerk |
| Industry | Post Office |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
1930
Middlesex, Massachusetts
Head, age 39
Middlesex, Massachusetts · implied b. ~1891 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Ernest B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Connecticut |
| Age at First Marriage | 30 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Post Office Clerk |
| Industry | Post Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25. |
| Radio Set | R |
| Veteran | Yes |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
1940
Middlesex-County, Massachusetts
Head, age 49
Middlesex-County, Massachusetts · implied b. ~1891 — 4 household members
| Surname | Peterson |
| Given Name | Ernest B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Connecticut |
| 1935 Residence (City) | Malden (city) |
| 1935 Residence (County) | Middlesex |
| Occupation | Clerk |
| Industry | Post-Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 2100 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
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 Ernest Peterson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Peterson (~0.92 confidence) and father Oscar Peterson (~0.92 confidence) and mother Alma Peterson (~0.92 confidence) and mother Alma Peterson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Peterson
b. ~1873
Source father
● Household
· direct · ~0.92
Father
Oscar Peterson
b. ~1863
Source father
● Household
· direct · ~0.92
Mother
Alma Peterson
b. ~1865
Source mother
● Household
· direct · ~0.92
Mother
Alma Peterson
b. ~1866
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ernest Peterson
Head · 1940 · age 49 · b. ~1891 · 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
39 people indexed on this census page (nara:1940:m-t0627-01608-00376)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Priscilla M. Cudd | 4 | Daughter | — | Massachusetts |
| 42 | Edward D. H. White | 28 | Head | General Mechanic | Massachusetts |
| 43 | Ruth Elenor G. B. White | 71 | Head | Surgical Appliance Fitter | New Hampshire |
| 44 | Martha A. White | 69 | Wife | — | New York |
| 45 | Perley C. Cousins | 38 | Head | Truck Driver | Maine |
| 46 | Ethel Cousins | 40 | Wife | — | Russia |
| 47 | Ethel E. Cousins | 14 | Daughter | — | Massachusetts |
| 48 | Arlene C. Cousins | 13 | Daughter | — | Massachusetts |
| 49 | Eleanor Cousins | 12 | Daughter | — | Massachusetts |
| 50 | Walter Cousins | 10 | Son | — | Massachusetts |
| 51 | Arthur Cousins | 9 | Son | — | Massachusetts |
| 52 | Helen T. Cousins | 6 | Daughter | — | Massachusetts |
| 53 | Mildred Cousins | 5 | Daughter | — | Massachusetts |
| 54 | Ernest Cousins | 3 | Son | — | Massachusetts |
| 55 | George H. Innes | 52 | Head | Beef Salesman | Canada-English |
| 56 | Louise Innes | 52 | Wife | — | Massachusetts |
| 57 | George E. Innes | 23 | Son | Lithograph Artist | Massachusetts |
| 59 | Victor E. Harmon | 44 | Head | Food Broker | Massachusetts |
| 60 | Lillian W. Harmon | 42 | Wife | — | Massachusetts |
| 61 | V. Elliott Harmon | 17 | Son | — | Massachusetts |
| 62 | Gustave A. Larson | 40 | Head | School Teacher | Massachusetts |
| 63 | Marian K. Larson | 33 | Wife | — | West Virginia |
| 64 | Joseph S. Larson | 1 | Son | — | Massachusetts |
| 65 | Carolyn Larson | 0 | Daughter | — | Massachusetts |
| 66 | Ernest B. Peterson THIS PERSON | 49 | Head | Clerk | Connecticut |
| 67 | Olga V. Peterson | 42 | Wife | — | Massachusetts |
| 68 | Eleanor M. Peterson | 18 | Daughter | — | Massachusetts |
| 69 | Ruth C. Peterson | 14 | Daughter | — | Massachusetts |
| 70 | Frederick A. Smith | 46 | Head | Y.M.C.A. Secretary | Massachusetts |
| 71 | Cora D. Smith | 47 | Wife | — | Massachusetts |
| 72 | Frederick Smith | 17 | Son | — | Massachusetts |
| 73 | Louis C. Smith | 27 | Head | School Teacher | Massachusetts |
| 74 | Ruth S. Smith | 27 | Wife | — | Massachusetts |
| 75 | Peter S. Smith | 0 | Son | — | Massachusetts |
| 76 | Rolie T. Harlow | 56 | Head | Structural Engineer | Canada-English |
| 77 | Eva H. Harlow | 55 | Wife | — | Pennsylvania |
| 78 | Theodore F. Harlow | 19 | Son | — | Massachusetts |
| 79 | Winthrop L. Webber | 44 | Head | School Principal | Maine |
| 80 | Margaret E. Webber | 41 | Wife | — | Connecticut |
Pedigree Summary
Ernest
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)