Rittenberg's rhymes with:
hoffenberg's, katzenberg's, rosenberg's, rosenbergs, wallenberg's, freedenberg's, greenberg's, hoffenberg's, katzenberg's, rosenberg's, rosenbergs, steinberg's, thornburg's, thornburgh's, thornburghs, thornburgs, wallenberg's
Rittenberg's sounds like:
rautenberg, rittenberg, rittenberry's, rodenberg, rodenburg, rotenberg, rothenberg, rottenberg, ruthenberg, ruttenberg