They're all... Leviyim !!! Taz = Rabbi David Segal HaLevi, Ra'ah = Rabbai Aharon HaLevi, Ra'avyah = Rabbi Eliezer ben Yoel HaLevi, Ba'al haMaor = Rabbi Zerachya HaLevi, Shach = Shabbetai Rappaport HaKohein (ok, that's a subset), and Rabbi Yehoshua of the Mishna is a Levi as evidenced by Kiddushin 27a.