Isabel de la Cerda also known as Isabel de la Cerda Pérez de Guzmán (Seville c.1329 - after 1383) was the only surviving daughter of Luis de la Cerda and his first wife Leonor de Guzmán;[1][better source needed] she was Lady of Puerto de Santa María and titular Princess of Fortuna. She was a member of the House de la Cerda.