Fernando "Fernand" Sanz y Martínez de Arizala (28 February 1881 – 8 January 1925) was a Spanish-born naturalized French racing cyclist, younger of two illegitimate sons of King Alfonso XII of Spain and his mistress, Elena Sanz. He participated in cycling at the 1900 Summer Olympics in Paris for France, and there won the silver medal in the men's sprint.