l of Cambridge — son of Isabella Perez of Castille — daughter of Maria Juana de Padilla — daughter of Maria Fernandez de Henestrosa — daughter of Aldonza Ramirez de Cifontes — daughter of Aldonza Gonsalez Giron — daughter of Sancha Rodriguez de Lara — daughter of Rodrigo Rodriguez de Lara — son of Sancha Alfonsez, Inf