the Portuguese is probably from the Iberian Union, there would some Portuguese settlers to Mexico during the Spanish colonial era, my parental grandma's last name is Chavez, but of course it's the Spanish version, but it could have be changed to "sound more Spanish", I don't think I have Portuguese ancestry though, 95% of Caucasoids that migrated to Mexico were Spaniards during colonial times, it was after Independence, when more Caucasoid peoples started migrating to parts of Mexico such as Mexico City for example.