Walther rhymes with:
altherr, altherr, arthur, auther, author, coauthor, ether, gaither, guenther, gunther, luther, macarthur, mahathir, mathur, mcarthur, panther, port-arthur, rother, ruether, ruther, sathre, uther, winterthur, winther
Walther sounds like:
walder, walter, walthour, wealthier, welder, well-doer, welter, wilder, wolter