WM
William Mckay — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this William Mckay across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 6-person household.
Age 14
b. ~1926
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | McKay |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | M |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Gloucester City |
| 1935 Residence (County) | Essex |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Gloucester City |
| Est. Birth Year | ~1926 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Mckay | Head | — | 37 | ~1903 |
| Russell Mckay | Son | — | 13 | ~1927 |
| Jeanette Mckay | Daughter | — | 10 | ~1930 |
| William Mckay | Son | — | 14 | ~1926 |
| Allie Mckay | Spouse | — | 36 | ~1904 |
| John Mckay | Son | — | 16 | ~1924 |
Census Appearances
1930
Essex, Massachusetts
Other, age 4
Essex, Massachusetts · implied b. ~1926 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McKay |
| Given Name | William F. Jr. |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Essex-County, Massachusetts
Son, age 14
Essex-County, Massachusetts · implied b. ~1926 — 6 household members
| Surname | McKay |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | M |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Gloucester City |
| 1935 Residence (County) | Essex |
| Hours Worked | 0 |
| Highest Grade | Hs 1 |
| 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 William Mckay across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Mckay
Son · 1940 · age 14 · b. ~1926 · Massachusetts
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Sibling
Jeanette Mckay
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Russell Mckay
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mckay
Sibling · 1940 · age 16
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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01579-00776)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary (X) The Dispatch | 51 | Wife | — | Canada-French |
| 42 | Francis The Dispatch | 22 | Son | Laborer | Canada-French |
| 43 | Doris The Dispatch | 10 | Daughter | — | Massachusetts |
| 44 | Lorna The Dispatch | 6 | Daughter | — | Massachusetts |
| 45 | Patient Boudreau | 76 | Head | — | Canada-French |
| 46 | Sophie (X) Boudreau | 76 | Wife | — | Canada-French |
| 47 | Clarence Boudreau | 27 | Son | Laborer | Massachusetts |
| 48 | Jason Daley | 74 | Head | — | Canada-English |
| 49 | Sarah Daley | 61 | Wife | Nurse | Canada-English |
| 50 | Marcella (X) Daley | 32 | Daughter | Technician | Massachusetts |
| 51 | John J. Brown | 49 | Head | Laborer | New York |
| 52 | Agnes (X) Brown | 60 | Wife | — | Canada-French |
| 53 | James Mckay | 24 | Step-son | Assistant | Massachusetts |
| 54 | James Langley | 58 | Lodger | Crew Member | Canada-French |
| 55 | Mariner J. Do Daley | 28 | Head | Cutter | Massachusetts |
| 56 | Carmen (X) Do Daley | 25 | Wife | — | Massachusetts |
| 57 | Charles P. Do Daley | 2 | Son | — | Massachusetts |
| 58 | Barbara Do Daley | 1 | Daughter | — | Massachusetts |
| 59 | William Mckay | 37 | Head | Helper | Massachusetts |
| 60 | Allie (X) Mckay | 36 | Wife | Lapper | Massachusetts |
| 61 | John J. Mckay | 16 | Son | — | Massachusetts |
| 62 | William Mckay THIS PERSON | 14 | Son | — | Massachusetts |
| 63 | Russell Mckay | 13 | Son | — | Massachusetts |
| 64 | Jeanette Mckay | 10 | Daughter | — | Massachusetts |
| 65 | James Riley | 57 | Head | Laborer | Massachusetts |
| 66 | Anna (X) Riley | 48 | Wife | — | Canada-French |
| 67 | James Riley | 19 | Son | Helper | Massachusetts |
| 68 | Eleanor Riley | 13 | Daughter | — | Massachusetts |
| 69 | Margaret White | 51 | Wife | — | Canada-French |
| 70 | Margaret J. White | 25 | Daughter | Clerk | Massachusetts |
| 71 | George White | 24 | Son | Clerk | Massachusetts |
| 72 | Gertrude White | 21 | Daughter | Clerk | Massachusetts |
| 73 | Russell White | 16 | Son | — | Massachusetts |
| 74 | Charles P. Amero | 53 | Lodger | Crew Member | Canada-French |
| 75 | Harry The Smith | 43 | Head | Pipe Fitter | Massachusetts |
| 76 | Clara (X) The Smith | 37 | Wife | — | Massachusetts |
| 77 | Kenyon The Smith | 15 | Son | — | Massachusetts |
| 78 | Hubert The Smith | 11 | Son | — | Massachusetts |
| 79 | Caroline The Smith | 2 | Daughter | — | Massachusetts |
| 80 | Joseph The Souza | 42 | Head | Laborer | Massachusetts |
Related Census Records
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)