Helmerich rhymes with:
emerich, emerick, emmerich, hemmerich, limerick, alaric, berberich, broderick, butterick, choleric, cyanuric, dederick, diederich, dieterich, emerich, emerick, emmerich, friederich, friederike, garverick, giegerich, gingerich, gregorich, hemmerich, honderich, kanarek, kasparek, kasperek, kauzlarich, klapperich, leverich, limerick, maverick, millerick, minarik, pekarek, phosphoric, puskarich, rhetoric, safarik
Helmerich sounds like:
hallmark, hallmark's, hallmarks, helmers