I'm a Galvan. Everyone from that side of my family is from Texas. The Mexican/Spanish ancestors have less than ideal permanent records.
I am searching myself. Here are some of the Galvans in my line going back generations. If it's the wrong family...no need to reply.
Ernesto - Frederico - Enrique - Roberto - Jose - Edwardo
Ernesto - Blanca
Emilio - Manuelia