Olshefski's rhymes with:
kosnovsky's, koznovsky's, olkowski's, orlowski's, zhirinovsky's, boesky's, boeskys, gazonsky's, husky's, izansky's, joske's, kaczynski's, kosmetsky's, kosnovsky's, koznovsky's, levinsky's, lewensky's, lewinsky's, lonsky's, mezvinsky's, muskie's, olkowski's, olshansky's, orloski's, orlosky's, orlowski's, radowski's, rostenkowski's, sitenski's, sitenskis, sorovski's, stravinsky's, tchaikovsky's, whiskeys, yevlinsky's, zhirinovsky's