Olsen rhymes with:
bolson, coalson, colson, dolson, folson, gholson, golson, holsten, joelson, jolson, molson, ohlsen, ohlson, ohlsson, olson, olsson, polson, toalson, tolson
Olsen sounds like:
ohlsen, ohlson, ohlsson, olajuwon, olesen, oleson, olexson, olguin, oligocene, ollison, olshan, olson, olsson