Someone from Zihua is called.....?

Zanka, is our local word for US people from Zihua,BUT this term is saved for us. We frown negatively when a foreigner uses that words, not because is bad but it " looks like you're trying to hard to fit in". We're Guerrerenzes 'cause our state or Cocho from Tierra Caliente of Guerrero, Zihuatanejenze for foreigners and others... Best to of all is to call each person by his name if you know it or Senor/Senora, instead of AMIGO!! UNLESS I'M YOUR FRIEND!!