The son of Maurice Crosbie; educated at Trinity College, Dublin, he was Rector at Castle Island, County Kerry.

REFERENCES TO William Crosbie, fourth baron Branden:

Thomas Creevey to Elizabeth Ord, 17 June 1828 in The Creevey Papers: A Selection from the Correspondence & Diaries of the late Thomas Creevey, M.P. (London: John Murray, 1903)