Alejandro Olivares was the son of Tomas de Olivares and Ana Gertrudis Longoria.
He requested a dispensation to marry Maria Francisca Treviño, due to cosanguinity of 3rd + 4th grade. They were married on 17 Aug 1787 in Camargo. The marriage record notes that he was an español from Rancho La Bonita (jurisdiction of Camargo) (?). Marriage source: (Link to original).