JK
John King — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John King across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Edwin & Arba — first a son (b.~1911), then head of a 9-person household.
Age 29
b. ~1911
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | King |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | Machine operator |
| Industry | Cloth Rubberizing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1688 |
| Highest Grade | No 7 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Machine Operator |
| Township / Ward | Boston City |
| Est. Birth Year | ~1911 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Anna King | Daughter | — | 20 | ~1920 |
| Barbara King | Daughter | — | 12 | ~1928 |
| Peter King | Head | — | 65 | ~1875 |
| John King | Son | — | 29 | ~1911 |
| Patrick King | Son | — | 23 | ~1917 |
| Martin King | Son | — | 18 | ~1922 |
| Peter King | Son | — | 25 | ~1915 |
| Thomas King | Son | — | 16 | ~1924 |
| Annie King | Spouse | — | 57 | ~1883 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 8
Suffolk, Massachusetts · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | King |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Suffolk, Massachusetts
Son, age 18
Suffolk, Massachusetts · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | King |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Son, age 29
Suffolk-County, Massachusetts · implied b. ~1911 — 9 household members
| Surname | King |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Occupation | Machine operator |
| Industry | Cloth Rubberizing |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1688 |
| Highest Grade | No 7 |
| 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 John King across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Edwin King (~0.92 confidence) and father Arba King (~0.92 confidence) and father Peter King (~0.92 confidence) and mother Annie King (~0.92 confidence) and mother Sarah King (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Edwin King
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Arba King
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Peter King
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Annie King
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Sarah King
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John King
Son · 1940 · age 29 · b. ~1911 · Massachusetts
★ You are viewing this record
Sibling
Barbara King
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas King
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peter King
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna King
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martin King
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick King
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
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-t0627-01665-00217)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Calnan | 17 | Son | — | Massachusetts |
| 2 | Roy Courvels | 23 | Head | Packer | Massachusetts |
| 3 | Mary Courvels | 22 | Wife | — | Massachusetts |
| 4 | Roy Courvels | 2 | Son | — | Massachusetts |
| 5 | Maedara Foley | 36 | Head | Laborer | Eire |
| 6 | Catherine Foley | 34 | Wife | — | Eire |
| 7 | John Foley | 7 | Son | — | Massachusetts |
| 8 | Margaret Foley | 6 | Daughter | — | Massachusetts |
| 9 | Mary T Foley | 1 | Daughter | — | Massachusetts |
| 10 | Frank J Harding | 51 | Head | Janitor | Massachusetts |
| 11 | Barbara Harding | 48 | Wife | Cleaner | Eire |
| 12 | Rosemary Harding | 19 | Daughter | Packer | Massachusetts |
| 13 | Francis J Harding | 18 | Son | Shipper | Massachusetts |
| 14 | Ann Marie Harding | 12 | Daughter | — | Massachusetts |
| 15 | Barbara L Harding | 12 | Daughter | — | Massachusetts |
| 16 | Martin Foley | 39 | Head | Molders Helper | Eire |
| 17 | Sarah Foley | 38 | Wife | — | Eire |
| 18 | John Foley | 9 | Son | — | Massachusetts |
| 19 | Martin Foley | 7 | Son | — | Massachusetts |
| 20 | William Foley | 6 | Son | — | Massachusetts |
| 21 | Mary Foley | 4 | Daughter | — | Massachusetts |
| 22 | Claire Foley | 3 | Daughter | — | Massachusetts |
| 23 | James Foley | 1 | Son | — | Massachusetts |
| 24 | John J Greene | 65 | Head | Maintenance Man | Newfoundland |
| 25 | Mary J Greene | 65 | Wife | — | Newfoundland |
| 26 | Mary M Greene | 30 | Daughter | Salesgirl | Newfoundland |
| 27 | Margaret Daly | 55 | Head | — | Massachusetts |
| 28 | William Daly | 45 | Brother | Elevator Operator | Massachusetts |
| 29 | Alice Daly | 40 | Sister | File Clerk | Massachusetts |
| 30 | Charles Daly | 39 | Brother | Order Clerk | Massachusetts |
| 31 | Peter King | 65 | Head | Laborer | Eire |
| 32 | Annie King | 57 | Wife | — | Massachusetts |
| 33 | John King THIS PERSON | 29 | Son | Machine Operator | Massachusetts |
| 34 | Peter King | 25 | Son | Cook | Massachusetts |
| 35 | Patrick King | 23 | Son | Laborer | Massachusetts |
| 36 | Anna King | 20 | Daughter | Machine Operator | Massachusetts |
| 37 | Martin King | 18 | Son | Forestry Man | Massachusetts |
| 38 | Thomas King | 16 | Son | — | Massachusetts |
| 39 | Barbara King | 12 | Daughter | — | Massachusetts |
| 40 | Patrick Welch | 47 | Head | Janitor | Eire |
Pedigree Summary
John + 6 siblings
Gen 1 · 5 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)