Sir Harry Trelawny 

Sir Harry Trelawny (1756-1834), after graduating from Oxford in 1773, spent several years as a Calvinistic Methodist preacher before becoming an Independent minister at Southampton.  In 1779 he became a Unitarian, only to renounce that position in 1789 and return to the Church of England, for which he was appointed prebendary in Exeter.  In 1810, however, he joined the Roman Catholic Church, becoming an ordained priest in 1831.