JC
John Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Campbell across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents James & Mary — first a head (b.~1891), then head of a 3-person household.
Age 49
b. ~1891
Male
Head
Born: Maine
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Campbell |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | waiter |
| Industry | in newspaper |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 310 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Occupation | Waiter |
| Township / Ward | Boston 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Jennie Campbell | Daughter | — | 19 | ~1921 |
| John Campbell | Head | — | 49 | ~1891 |
| Hazel Campbell | Spouse | — | 40 | ~1900 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 22
Suffolk, Massachusetts · implied b. ~1898 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | Mass |
| Mother's Birthplace | Maine |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1930
Suffolk, Massachusetts
Head, age 34
Suffolk, Massachusetts · implied b. ~1896 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Maine |
| Age at First Marriage | 21 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Printer |
| Industry | Newspaper |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 35 |
| Radio Set | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1940
Suffolk-County, Massachusetts
Head, age 49
Suffolk-County, Massachusetts · implied b. ~1891 — 3 household members
| Surname | Campbell |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | Boston city |
| 1935 Residence (County) | Suffolk |
| Occupation | waiter |
| Industry | in newspaper |
| Class of Worker | PW |
| Hours Worked | 32 |
| Income (1939) | 310 |
| Highest Grade | No 8 |
| 1935 Residence | Same Place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Campbell (~0.92 confidence) and mother Mary Campbell (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Campbell
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Mary Campbell
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Campbell
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 — 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-t0627-01666-00107)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Milton Hearst | 7 | Son | — | Same Place |
| 42 | Margaret Hearst | 2 | Daughter | — | Same Place |
| 43 | Robert Sherwood | 54 | Lodger | Laborer | Same Place |
| 44 | John Cleary | 35 | Head | Houseman | Eire |
| 45 | Katherine Cleary | 34 | Wife | — | Eire |
| 46 | John Cleary | 7 | Son | — | Same Place |
| 47 | Katherine Cleary | 4 | Daughter | — | Same Place |
| 48 | Mary Cleary | 2 | Daughter | — | Same Place |
| 49 | John Riley | 33 | Head | Truck Driver | Quebec |
| 50 | Margaret Riley | 33 | Wife | — | Same Place |
| 51 | John Riley | 7 | Son | — | Same Place |
| 52 | Gertrude Riley | 4 | Daughter | — | Same Place |
| 53 | Joseph Marcella | 49 | Head | Laborer | Italy |
| 54 | Marie Marcella | 42 | Wife | — | Italy |
| 55 | Charles Marcella | 26 | Son | Sheet Metal Worker | Same Place |
| 56 | Michael Marcella | 25 | Son | Repair Man | Same Place |
| 57 | Nora Sullivan | 34 | Head | — | Ireland |
| 58 | Mary Sullivan | 9 | Daughter | — | Same Place |
| 59 | Lloyd Foulds | 26 | Boarder | Truck Driver | Michigan |
| 60 | Charles Bononno | 48 | Head | Barber | Italy |
| 61 | Mary Bononno | 47 | Wife | New Worker | Italy |
| 62 | Katherine Bononno | 20 | Daughter | — | Same Place |
| 63 | Mary Bononno | 11 | Daughter | — | Same Place |
| 64 | Florence Bononno | 7 | Daughter | — | Same Place |
| 65 | Albert St. Lawrence | 21 | Head | — | Same Place |
| 66 | James St. Lawrence | 30 | Husband | Laborer | Maine |
| 67 | Carolyn St. Lawrence | 2 | Daughter | — | Same Place |
| 68 | John Campbell THIS PERSON | 49 | Head | Waiter | Maine |
| 69 | Hazel Campbell | 40 | Wife | — | Maine |
| 70 | Jennie Campbell | 19 | Daughter | Chauffeur | Same Place |
| 71 | Thomas Mcelroy | 31 | Head | Night Watchman | Same Place |
| 72 | Jennie Mcelroy | 30 | Wife | Cleaner | Florida |
| 73 | Helen Mcelroy | 5 | Daughter | — | Same Place |
| 74 | Thomas Mcelroy | 5 | Son | — | Same Place |
| 75 | Michael Mcelroy | 26 | Brother | Runs Elevator | Same Place |
| 76 | Fredie Crocker | 26 | Head | Sheet Metal Worker | Same Place |
| 77 | Angela Crocker | 29 | Wife | — | Same Place |
| 78 | Robert Crocker | 5 | Son | — | Same Place |
| 79 | Carol Crocker | 2 | Daughter | — | Same Place |
| 80 | Eva Groovely | 70 | Mother-in-law | — | Same Place |
Pedigree Summary
John
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)