JP
John Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Peterson across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Eric & Eric — first a son (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Peterson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Machinist Apprentice |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1100 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Machinist Apprentice |
| Township / Ward | Boston |
| Est. Birth Year | ~1917 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Eric Peterson | Head | — | 47 | ~1893 |
| Carl Gustafson | Other | — | 72 | ~1868 |
| John Peterson | Son | — | 23 | ~1917 |
| Elsie Peterson | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 3
Suffolk, Massachusetts · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | John E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 13
Suffolk, Massachusetts · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 23
Suffolk-County, Massachusetts · implied b. ~1917 — 4 household members
| Surname | Peterson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | Machinist Apprentice |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1100 |
| Highest Grade | H 4 |
| 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 John Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Eric Peterson (~0.92 confidence) and father Eric Peterson (~0.92 confidence) and mother Elsie Peterson (~0.92 confidence) and mother Elsie Peterson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Eric Peterson
b. ~1893
Source father
● Household
· direct · ~0.92
Father
Eric Peterson
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Elsie Peterson
b. ~1897
Source mother
● Household
· direct · ~0.92
Mother
Elsie Peterson
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Peterson
Son · 1940 · age 23 · b. ~1917 · 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 — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01679-00524)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Collins | 12 | Son | — | Massachusetts |
| 42 | Kenneth Collins | 5 | Son | — | Massachusetts |
| 43 | Paul Guardo | 63 | Head | — | Italy |
| 44 | Carmella Guardo | 62 | Wife | — | Italy |
| 45 | James Guardo | 39 | Son | Physician | Italy |
| 46 | Ann Guardo | 32 | Daughter | Apprentice | Massachusetts |
| 47 | Josephine Guardo | 24 | Daughter | Private Secretary | Massachusetts |
| 48 | Marie Guardo | 23 | Daughter | Private Secretary | Massachusetts |
| 49 | John Dame | 46 | Head | Police Officer | Massachusetts |
| 50 | Margaret Dame | 49 | Wife | — | Massachusetts |
| 51 | Robert Dame | 10 | Son | — | Massachusetts |
| 52 | Eric E. Peterson | 47 | Head | Machinist | Sweden |
| 53 | Elsie D. Peterson | 42 | Wife | — | Sweden |
| 54 | John Peterson THIS PERSON | 23 | Son | Machinist Apprentice | Massachusetts |
| 55 | Carl Gustafson | 72 | Father-in-law | Watchman | Sweden |
| 56 | John Mates | 37 | Head | Coal Bagger | Massachusetts |
| 57 | Emma Mates | 32 | Wife | Presser | Massachusetts |
| 58 | Irene Mates | 11 | Daughter | — | Massachusetts |
| 59 | Mary Mates | 8 | Daughter | — | Massachusetts |
| 60 | John Mates | 77 | Father | — | Lithuania |
| 61 | Sister Bernice | None | F | Restaurant | — |
| 62 | Brother Charles | None | M | Food Products | — |
| 63 | Peter Loomis | 58 | Head | Salesman | Greece |
| 64 | Pauline Loomis | 42 | Wife | — | Greece |
| 65 | Elaine Loomis | 20 | Daughter | — | Massachusetts |
| 66 | Iphigenia Loomis | 17 | Daughter | — | Massachusetts |
| 67 | George E. Loomis | 12 | Son | — | Massachusetts |
| 68 | John Shuloflian | 50 | Head | Tailor | Armenia |
| 69 | Mary Shuloflian | 48 | Wife | — | Greece |
| 70 | Alice Shuloflian | 18 | Daughter | — | Massachusetts |
| 71 | Alma Shuloflian | 17 | Daughter | Examiner | Massachusetts |
| 72 | Jean Shuloflian | 15 | Daughter | — | Massachusetts |
| 73 | Madeline Shuloflian | 11 | Daughter | — | Massachusetts |
| 74 | — | None | — | — | — |
| 75 | Florence Blackmore | 56 | Head | — | England |
| 76 | James Blackmore | 27 | Son | Handy Man | England |
| 77 | Betty Blackmore | 20 | Daughter | Stenographer | England |
| 78 | Isabel Mcdonald | 65 | Head | Stitcher | New Hampshire |
| 79 | Elorac Mcdonald | 30 | Daughter | Operator | Massachusetts |
| 80 | Barbara Johnson | 30 | Lodger | Operator | Massachusetts |
Pedigree Summary
John
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)