My mothers' mothers' maiden name was Popovich. They came from a town in/near Mitocul Dragomirna in/near Transylvania. The spelling of Popowitsch could be a German translation of the name Popovich. In the research of my family I've found that the suffix of a name vich, witsch, etc. has been changed. For instance the Surname of my fathers' father is Turewicz. This is the polish spelling, but he came from Lithuania. In Lithuania the appropriate name is Turevicous. The suffixs usually mean son or daughter of.