Firpo rhymes with:
burpo, harpo, acampo, alpo, bacigalupo, bontempo, burpo, cacioppo, campo, cantalupo, capo, cappo, conasupo, contempo, crespo, crispo, cupo, defilippo, delcampo, depo, depot, difilippo, episcopo, expo, filippo, flippo, gestapo, grippo, grupo, gruppo, harpo, hippo, hypo, kimpo, lampo, leppo, lippo, lupo, nappo, o'campo, obispo, ocampo, okpo, piscopo, pupo, repo, restrepo, sanfilippo, stumpo, swapo, tampopo, tipo, typo, zippo
Firpo sounds like:
fairview, farabee, farb, farve, ferebee, ferrebee, feverfew, fiberweb, frap, fraph, freebie, freehoff, fruehauf, furbee, furby