Suffix -itz

I read that the -itz suffix is Wendish. I thought that was around the Neumark and Oderbruch area of Brandenburg, East Prussia (now Germany). My ancestors named Bublitz lived in Kreis Angerapp, East Prussia (now Russia) about 1800 to 1850. Also, can you guess the meaning of the name? Thank you. Zelda Dubel. rvdubel@msn.com