Olguin rhymes with:
holguin, holguin, beghin, burgin, coggin, duggin, fagin, feigin, flanagin, goggin, googin, hangin', holguin, jungin, kagin, koryagin, kosygin, mangin, melugin, mungin, muskegon, nagin, riggin, rogin, scoggin, scogin, scroggin, singin', wergin, wiggin, zalygin
Olguin sounds like:
ohlsen, ohlson, ohlsson, olajuwon, olesen, oleson, olexson, oligocene, ollison, olsen, olshan, olson, olsson