Harlequin rhymes with:
chautauquan, mequon, sequin, arwen, awan, baldwin, chautauquan, edwin, gawain, genuine, goguen, hudwon, iowan, irwin, iwen, kerwen, mequon, nicaraguan, penguin, radwan, salwen, sequin, shawhan, urwin
Harlequin sounds like:
haralson, harelson, harlison, harralson, harrelson