Kirk's Grandfather, Bertrand Francis Corcoran was born 7 January 1903 in Chicago, Cook, Illinois to Timothy Corcoran and Helen Schmitt Corcoran.
He lived most of his life in Grand Rapids, Michigan. He married Leona Dollaway in 1925. They had five children: Richard, Elizabeth, Helen, Nancy and John.
Bertrand F. Corcoran died 21 July 1959 in Elk Rapids, Antrim, Michigan at the age of 56. He is buried in Woodlawn Cemetery, Grand Rapids, Michigan.