 His father and grandfather both opposed the Glorious Revolution, and thereafter lived quietly on their County Kerry estates; Maurice's election to the House of Commons in 1713 marked the family's return to political prominence.The Crosbie family were of Gaelic and Catholic origin, but Maurice's ancestor John Crosbie converted to the Church of Ireland in the reign of Elizabeth I and was made Bishop of Ardfert.His descendants became substantial landowners in Kerry