Frederick Howard 5th Earl of Carlisle
 Frederick Howard 5th Earl of Carlisle KG KT PC (28 May 1748 – 4 September 1825) was a British diplomat and the son of Henry Howard 4th Earl of Carlisle and his second wife Isabella Byron.His mother was a daughter of William Byron 4th Baron Byron and his wife Hon. Frances Berkeley a descendant of John Berkeley 1st Baron Berkeley of Stratton. She was also a sister of William Byron 5th Baron Byron and a great-aunt of George Gordon Byron 6th Baron Byron the poet.