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John Mckay — 1940 US Census Record
Model Tree available1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this John Mckay across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Helen & Helen — first a son (b.~1917), then head of a 7-person household.
Age 23
b. ~1917
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | McKay |
| Given Name | John E. |
| 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 | Helper |
| Industry | Navy Yard |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Helper |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mabel Mckay | Daughter | — | 18 | ~1922 |
| John Mckay | Son | — | 23 | ~1917 |
| Benjamin Mckay | Son | — | 26 | ~1914 |
| Alice Mckay | Daughter | — | 24 | ~1916 |
| Helen Mckay | Daughter | — | 22 | ~1918 |
| Helen Mckay | Spouse | — | 50 | ~1890 |
| Benjamin Mckay | Head | — | 50 | ~1890 |
Census Appearances
1920
Suffolk, Massachusetts
Son, age 3
Suffolk, Massachusetts · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McKay |
| Given Name | John E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Boston, Massachusetts
Son, age 13
Boston, Massachusetts · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McKay |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| 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 23
Suffolk-County, Massachusetts · implied b. ~1917 — 7 household members
| Surname | McKay |
| Given Name | John E. |
| 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 | Helper |
| Industry | Navy Yard |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| 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 Mckay across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: mother Helen Mckay (~0.92 confidence) and mother Helen Mckay (~0.92 confidence) and father Benjamin Mckay (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Helen Mckay
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Helen Mckay
b. ~1890
Source mother
● Household
· direct · ~0.92
Father
Benjamin Mckay
b. ~1891
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Mckay
Son · 1940 · age 23 · b. ~1917 · Massachusetts
★ You are viewing this record
Sibling
Helen Mckay
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Mckay
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Benjamin Mckay
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mabel Mckay
Sibling · 1940 · age 18
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-t0627-01680-00711)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John R. Beverstock | 63 | Head | Electrician | Massachusetts |
| 42 | Georgiana Beverstock | 64 | Wife | — | Massachusetts |
| 43 | Olive E. Beverstock | 38 | Daughter | Private Secretary | Massachusetts |
| 44 | Doris E. Hanson | 31 | Daughter | Law Clerk | Massachusetts |
| 45 | Margaret G. Burke | 65 | Head | — | Irish Free State |
| 46 | Mabel Burke | 40 | Daughter | Secretary | Massachusetts |
| 47 | Eleanor Burke | 38 | Daughter | Private Secretary | Massachusetts |
| 48 | Joseph Burke | 37 | Son | Maintenance Work | Massachusetts |
| 49 | John Burke | 35 | Son | Maintenance Work | Massachusetts |
| 50 | Benjamin Mckay | 50 | Head | Mechanic | Massachusetts |
| 51 | Helen G. B. Mckay | 50 | Wife | — | Massachusetts |
| 52 | Benjamin Jr. Mckay | 26 | Son | Clerk | Massachusetts |
| 53 | Alice L. Mckay | 24 | Daughter | Stenographer | Massachusetts |
| 54 | John E. Mckay THIS PERSON | 23 | Son | Helper | Massachusetts |
| 55 | Helen P. Mckay | 22 | Daughter | Teacher | Massachusetts |
| 56 | Mabel E. Mckay | 18 | Daughter | — | Massachusetts |
| 57 | John P. Hasson | 47 | Head | Conductor | Massachusetts |
| 58 | Mary A. Hasson | 35 | Wife | — | Massachusetts |
| 59 | Patricia M. Hasson | 5 | Daughter | — | Massachusetts |
| 60 | Jessie S. Malm | 51 | Head | — | Massachusetts |
| 61 | Russell Malm | 27 | Son | Manager | Massachusetts |
| 62 | Robert A. Malm | 24 | Son | Salesman | Massachusetts |
| 63 | Norman A. Malm | 20 | Son | Salesman | Massachusetts |
| 64 | Albert E. Malm | 9 | Son | — | Massachusetts |
| 65 | Frederick Dutton | 56 | Head | Salesman | Massachusetts |
| 66 | Catherine Dutton | 54 | Wife | — | Massachusetts |
| 67 | George F. Dutton | 26 | Son | Clerk | Massachusetts |
| 68 | Bernard Dutton | 22 | Son | Salesman | Massachusetts |
| 69 | Anna Dutton | 20 | Daughter | New Worker | Massachusetts |
| 70 | Eleanor Dutton | 14 | Daughter | — | Massachusetts |
| 71 | Dora M. B. Bakery | 77 | Head | — | Massachusetts |
| 72 | Colma E. Bakery | 48 | Daughter | Bookkeeper | Massachusetts |
| 73 | Maurice B. Herlihy | 77 | Head | — | New Hampshire |
| 74 | Mildred K. Herlihy | 41 | Daughter | Teacher | New Hampshire |
| 75 | John A. Ryder | 64 | Head | Track Coach | Massachusetts |
| 76 | Bridget T. Ryder | 60 | Wife | — | Canada-English |
| 77 | Anna Ryder | 32 | Daughter | Secretary | Massachusetts |
| 78 | Francis Ryder | 24 | Son | Ground Keeper | Massachusetts |
| 79 | Paul Ryder | 23 | Son | Clerk | Massachusetts |
| 80 | Joseph Ryder | 22 | Son | Ice Man | Massachusetts |
Pedigree Summary
John + 4 siblings
Gen 1 · 3 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)