Kieffer rhymes with:
keefer, keifer, keiffer, kiefer, briefer, giefer, keefer, keifer, keiffer, kiefer, liefer, reefer, schiefer, schieffer, schriefer, sheaffer
Kieffer sounds like:
kafer, kapfer, kapoor, kapor, kapper, kapur, kaspar, kasper, kaufer, kaypro, keefer, keeper, keever, kefauver, keffer, keifer, keiffer, keiper, kever, kiefer, kieper, kifer, kiper, kipfer, kipper, kippur, kober, kochevar, koper, kopera, kopper, kovar, kover, kuiper, kuper, kupfer, kupor, kupper, kuyper