Dead Ends

Does anyone have info on Josepha Hernandez Dominguez
who married Sebastian Macias Valadez on 5 Feb 1680
in Aguascalientes, the marriage record does not list their
parents.

Garza/Garcia

Reading the posts and the interchangability of surnames found in the 16 and 1700's, has anyone found the surnames of De la Garza and Garcia to be interchangeable from one event to another?  Than