Boltzmanns rhymes with:
boltzmann's, boltzmann's, boltzmann's, boltzmann's, mutzman's, statesman's, weitzman's, boltzmann's, congressman's, foxman's, glickman's, grossman's, heisman's, houseman's, mutzman's, policeman's, statesman's, wacksman's, waxman's, weitzman's
Boltzmanns sounds like:
bloodsucking, blotching, bludgeoning, boltzmann's, bulldozing