 Pile was born in Dublin as the second child of Sir Thomas Devereux Pile, 1st Baronet and his wife, Caroline Maude Nicholson, Sir Thomas served as the Lord Mayor of Dublin from 1900 to 1901.Pile had an older sister and two younger brothers.His youngest brother, Cyril John Pile, served in the Royal Flying Corps during the First World War, and was killed in action in 1917.