Estrada bocanegra ancestors brickwall

Does anybody know who the parents of Beatriz Andrada Bocanegra are? I descend from the Bocanegra from my Cervantes line but have been unable to go further on this line. Beatriz is the wife of Bernardino de Estrada "El Viejo" who is the son of Conquistador Francisco de Estrada, and grandson of Juan Sanchez de Estrada.

Thanks,
R.A.Ricci