hi-sorry I have taken so long to get back to you, but thank you for taking your time. I have a marriage record on their granddaughter Theresa Calixta Salinas who was married March 22, 1789 San Juan Bautista, en ARRASATE,Gipuzkoa. In this record it states she is the daughter of Anna Maria Muguerza and Barthelome de Salinas and granddaughter of Bauptista de Muguerza and Josepha de Lizardi both naturals of Marquina and Francisco Antonio de Salinas of Bedoña and Ignacia de Azcargorta of Mondragon, Arrasate, Guipuzcoa. Anna Maria and Barthelome de Salinas were married December 05, 1763 San Andres, Eibar, Guipuzcoa, Spain. That's about all I know of Bauptista except that his parents may be Andres Muguerza and Maria Barroeta but I have nothing to prove this.
thank you again for your effort to help.