They married in Hidalgo County and they only have the information that appears in the marriage license. The county vital statistics does not include information on their parents. Their son (my father-in-law named Carlos Martinez) was baptized in Our Lady of Guadalupe Church in Mission in 1912 and they only have the names of the parents (Jose Maria Martinez and Manuela Nava) and a witness. There is no information about the grandparents at that church.