HP
Henry Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Henry Peterson across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Catherine & Catherine — first a head (b.~1905), then head of a 4-person household.
Age 35
b. ~1905
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Peterson |
| Given Name | Henry |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville (city) |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Truck Driver |
| Industry | Transportation Co. |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1820 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Truck Driver |
| Township / Ward | Somerville City |
| Est. Birth Year | ~1905 |
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 Henry | Age | Birth yr |
|---|---|---|---|---|
| Henry Peterson | Head | — | 35 | ~1905 |
| Robert Wing | Other | — | 7 | ~1933 |
| Russell Peterson | Son | — | 15 | ~1925 |
| Doris Peterson | Spouse | — | 34 | ~1906 |
Census Appearances
Son, age 15
Middlesex, Massachusetts · implied b. ~1905 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Trimmer |
| Industry | Tannery |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 25
Middlesex, Massachusetts · implied b. ~1905 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Petersen |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Truck Driver |
| Industry | General Trucking |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 35
Middlesex-County, Massachusetts · implied b. ~1905 — 4 household members
| Surname | Peterson |
| Given Name | Henry |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Somerville (city) |
| 1935 Residence (County) | Middlesex |
| Occupation | Truck Driver |
| Industry | Transportation Co. |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1820 |
| Highest Grade | H 2 |
| 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 Henry Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Catherine Peterson (~0.92 confidence) and mother Catherine Petersen (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Catherine Peterson
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Catherine Petersen
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Henry Peterson
Head · 1940 · age 35 · b. ~1905 · 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-t0627-01705-00225)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robert A. Mckay | 45 | Head | Superintendent | Massachusetts |
| 42 | Robert A. Mckay | 19 | Son | — | Massachusetts |
| 43 | Marie Anderson | 23 | Daughter | — | Massachusetts |
| 44 | George Anderson | 23 | Son-in-law | Sales Manager | Massachusetts |
| 45 | Ellen M. Anderson | 4 | Granddaughter | — | Massachusetts |
| 46 | Henry Peterson THIS PERSON | 35 | Head | Truck Driver | Massachusetts |
| 47 | Doris Peterson | 34 | Wife | — | Massachusetts |
| 48 | Russell Peterson | 15 | Son | — | Massachusetts |
| 49 | Robert Wing | 7 | Boarder | — | Massachusetts |
| 50 | Charles Stein | 56 | Head | Janitor | Massachusetts |
| 51 | Sarah Horton | 84 | Aunt | — | Massachusetts |
| 52 | Willard Gilmore | 67 | Head | Carpenter | Canada English |
| 53 | Mary Gilmore | 64 | Wife | — | Canada English |
| 54 | Persilla Hatch | 67 | Head | — | Maine |
| 55 | George B. Vigneau | 23 | Head | — | Massachusetts |
| 56 | Martha Vigneau | 53 | Mother | — | Canada French |
| 57 | Walter J. Vigneau | 25 | Brother | Painter | Massachusetts |
| 58 | Michael Renzulli | 38 | Head | Truck Driver | Massachusetts |
| 59 | Elaine Renzulli | 30 | Wife | — | Massachusetts |
| 60 | Frank B. Musgrove | 41 | Head | Meat Salesman | Massachusetts |
| 61 | Sylvia E. Musgrove | 32 | Wife | Shoe Maker | Massachusetts |
| 62 | John Brown | 38 | Head | Stevedore | Kentucky |
| 63 | Diana Brown | 39 | Wife | — | New Hampshire |
| 64 | Edward O'Neill | 17 | Son | Race Tracker | Massachusetts |
| 65 | John Dillon | 40 | Head | Pump Operator | Canada English |
| 66 | Nellie Dillon | 38 | Wife | — | Canada English |
| 67 | William Dillon | 5 | Son | — | Massachusetts |
| 68 | Doris Dillon | 7 | Daughter | — | Massachusetts |
| 69 | Gerald Dillon | 5 | Son | — | Massachusetts |
| 70 | Ronald Dillon | 4 | Son | — | Massachusetts |
| 71 | John Dillon | 2 | Son | — | Massachusetts |
| 72 | Ellen Dillon | 1 | Daughter | — | Massachusetts |
| 73 | Janette Dillon | 30 | Sister | Waitress | Massachusetts |
| 74 | Matthew Long | 48 | Head | Foreman | Massachusetts |
| 75 | Long | 49 | Wife | — | Massachusetts |
| 76 | Long | 19 | Son | Stationary Engineer | Massachusetts |
| 77 | Long | 21 | Daughter | Shoe Maker | Massachusetts |
| 78 | Long | 12 | Daughter | — | Massachusetts |
| 79 | Leslie Barnum | 37 | Head | — | Massachusetts |
| 80 | Arlene Barnum | 34 | Wife | — | Massachusetts |
Related Census Records
Pedigree Summary
Henry
Gen 1 · 2 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)