Luisa Sigea de Velasco, also known as Luisa Sigeia, Luisa Sigea Toledana and in the Latinized form Aloysia Sygaea Toletana, was a poet and intellectual, one of the major figures of Spanish humanism. She spent a good part of her life at the Portuguese court in the service of Maria of Portugal (1521–1577), as her lady-in-waiting and Latin teacher.