John William Mackay III (1905-1990)

of 'Happy House' Roslyn & Matinecock Farm, Lattingtown, L.I., New York

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Family
Notes / Biography Associated Houses (2) References

Parents (2)

Clarence Hungerford Mackay

of 3 East 75th Street, New York City & "Harbor Hill" Roslyn, L.I.

1874-1938

Katherine (Duer) Mackay

Mrs. "Kitty" Alexander (Duer) Mackay, Blake

1880-1930

Spouse (1)

Josephine Gwendolyn Rose

Mrs. "Gwen" (Rose) Mackay

1908-2004

Children (1)

Michael Mackay

b.1931

Associated Houses (2)

Harbor Hill

Roslyn, New York

Matinecock Farm

Lattingtown & Locust Valley, New York