Irwin rhymes with:
kerwen, urwin, arwen, awan, baldwin, chautauquan, edwin, gawain, genuine, goguen, harlequin, hudwon, iowan, iwen, kerwen, mequon, nicaraguan, penguin, radwan, salwen, sequin, shawhan, urwin
Irwin sounds like:
ierne, iran, irani, iranian, ireene, irena, irene, irian, irina, irma, iron, irony