Navarro Gaytan, Alvarez del Castillo and Asencio de Leon

Does anyone know the patriarchs or early information
of these families mentioned above? I have Juan Asencio Ponce
de Leon as the earliest 1600, and have the three Isabel Alvarez
del Castillo each namesakes, 1550, 1575, 1600 and a Juan Alvarez
del Castillo 1600. Not sure how theyre related to this Juan?
And im so confused about the Navarro Gaytan family in the 1500s-1600s.

Thanks,
Daniel