John William Mackay III (1905-1990)

John William Mackay III, of Matinecock Farm, Long Island, New York

Father
Clarence Hungerford Mackay (1874-1938)
Mother
Katherine (Duer) Mackay (1880-1930)
Spouse
Josephine Gwendolyn Rose (1908-2004)

Associated Houses

Harbor Hill

Roslyn

Matinecock Farm

Lattingtown & Locust Valley

Contributed by Mark Meredith on 10/03/2019 and last updated on 10/03/2019.