Background
Blake, Katherine Alexander Duer was born on May 9, 1879 in New York City. Daughter of William Alexander and Ellin (Travers) Duer.
Blake, Katherine Alexander Duer was born on May 9, 1879 in New York City. Daughter of William Alexander and Ellin (Travers) Duer.
Educated at home.
William Alexander Duer, Mary.
Married Clarence Hungerford Mackay, May 17, 1898. Married second, Joseph Augustus Blake, Doctor of Medicine November 1914 (divorced 1929). Children: Katherine (Mistress Kenneth O’Brien), Ellin (Mistress Irving Berlin), John William.