Olthoff rhymes with:
potthoff, puthoff, saathoff, westhoff, benninghoff, bohnhoff, brinkerhoff, brockhoff, eckhoff, eickhoff, friedhoff, fruehauf, hoelterhoff, imhoff, kohlhoff, lenhoff, neuhoff, osterhoff, potthoff, puthoff, saathoff, steinhoff, uphoff, vanderhoff, wemhoff, westerhoff, westhoff