Ottoson rhymes with:
acheson, addison, allison, amason, andreassen, comparison, dickason, diocesan, eliason, eliassen, fergason, fergeson, ferguson, fergusson, furgason, genemedicine, grieveson, hannesson, higgason, iason, jesudason, jonassen, liason, liasson, madison, magnuson, magnussen, magnusson, marcussen, markuson, matheson, mathiasen, mathiason, medicine, monessen, myosin, niacin, nicoson, oveson, purgason, radisson, rasmuson, rasmussen, rasmusson, thomason, thomassen, thomasson, tobiason, unison, vargason, venison
Ottoson sounds like:
odds-on, oetken, ottesen, otteson, ottosen, outcome, outgain, outgun, outshine, outshone