Jefferis rhymes with:
amaris, barberis, decesaris, deloris, demaris, halamandaris, madaris, majerus, maoris, medearis, saddoris, sideris
Jefferis sounds like:
jabar's, jaffray's, jasper's, jaspers, javorsky, jefferies, jefferies', jefferies's, jeffers, jefferys, jeffress, jeffrey's, jeffreys, jeffries, jobbers