Gregorich rhymes with:
giegerich, gingerich, alaric, berberich, broderick, butterick, choleric, cyanuric, dederick, diederich, dieterich, emerich, emerick, emmerich, friederich, friederike, garverick, giegerich, gingerich, helmerich, hemmerich, honderich, kanarek, kasparek, kasperek, kauzlarich, klapperich, leverich, limerick, maverick, millerick, minarik, pekarek, phosphoric, puskarich, rhetoric, safarik
Gregorich sounds like:
grassers, gregarious, gregory's, grocer's, groceries, grocers