When William McEnhill was born on 4 March 1863, his father, Hugh, was 28 and his mother, Catherine, was 27. He married Catherine G McEnhill on 31 May 1896 in Manhattan, New York, USA. They had one child during their marriage. He died on 30 December 1943 at the age of 80. His niece Norma Celestine McEnhill married Felix McMahon who then had one son Peter and one daughter Marie.