Nathan's rhymes with:
athans, athens, githens, johnathan's, johnathon's, jonathan's, lengthens, pathans, strengthens, worthen's
Nathan's sounds like:
nading, nation's, nations, nations', natomas, neatness, needham's, needing, neotenic, netanyahu's, netting, newton's, newtonchik, nodding, nominating, nominations, notations, nothing, nothing's, nothings, noting, notions, nutmeg, nutting