Ruiz de Velasco y Haro

Can Any HELP! Those who have Ruiz de Velasco lines in Los Altos
the patriarch is Pedro Ruiz de Velasco y Haro married to ANa Núñez
y Bohórrquez. He is supposed to have been a relative of the Viceroy
Luís Ruiz de Velasco y Haro or commonly shortened to Luís de Velasco.
Has anyone made this connection yet or have any info or leads? If
Pedro was a Velasco y Haro he has to descend from Antonio
de Velasco, Sñor de salinas and Juana Ruiz de Alarcón. The Ruiz de Velasco y Haro last name was created when these two married. I have Pedro born ca. 1590
His uknown father ca. 1560 and his grandfather uknown ca. 1518 and his grt grandfather should be Antonio de Velasco and Juana Ruiz de Alarcón. Who
knows maybe the viceroy was his grandfather anything is possible but we need proof. Any leads or info welcomed! -Daniel Méndez del Camino