Alexander the Great | 13th United States Congress | Alexander Pope | Alexander | Alexander Graham Bell | Alexander Calder | Alexander Pushkin | James Earl Jones | Alexander von Humboldt | Alexander I of Russia | Prince Edward, Earl of Wessex | Louis Mountbatten, 1st Earl Mountbatten of Burma | Alexander II of Russia | Herbert Kitchener, 1st Earl Kitchener | Upton Sinclair | Alexander Hamilton | Earl | Alexander McQueen | Frederick Roberts, 1st Earl Roberts | Earl of Derby | Alexander II | Caithness | Earl Warren | Pope Alexander III | Jason Alexander | Earl of Pembroke | Alexander I | Robert Harley, 1st Earl of Oxford and Earl Mortimer | Earl of Warwick | Alexander Korda |
Caithness was the son of Alexander Sinclair, 13th Earl of Caithness, and his wife Frances Harriet, daughter of the Very Reverend William Leigh, Dean of Hereford.