My cousins have north american indian (my side of the family), south american indian and galician dna. And Irish on their mom’s side. LOL.
The maternal grandmother was from a ‘high class’ family that was from money. Which might explain the difference in Catholic practice wrt tradition.
Any idea where your mtDNA is from?
No-If I ever have extra money to play with again, I want to get one of those kits from NatGeo and send in a cheek swab to find out. Since the traceable records stop at the area of Spain they came from, and the passenger manifests of ships, it probably doesn’t hold many surprises unless they can trace a it further back-then it probably just leads to the Romans.