Alfred David Augustus d'Espinassy de Fontanelle (1827–1882) was the 5th Marquis of Fontanelle and member of the House of Essex. He was born on 28 April 1827 in England to the Marquis of Fontanelle, Blaire Marius d'Espinassy de Fontanelle, and Lady Maria Capell, sister of the Earl of Essex. His grandfather was Antoine Joseph Marie d'Espinassy, a member of the council that decided the fate of Louis Capet of France in his trial after the French Revolution.