Altherr rhymes with:
walther, arthur, auther, author, coauthor, ether, gaither, guenther, gunther, luther, macarthur, mahathir, mathur, mcarthur, panther, port-arthur, rother, ruether, ruther, sathre, uther, walther, winterthur, winther
Altherr sounds like:
alatorre, alder, aldora, aleatory, altair, altar, alter, altera, altier, altieri, altra