Klapperich rhymes with:
kasparek, kasperek, alaric, berberich, broderick, butterick, choleric, cyanuric, dederick, diederich, dieterich, emerich, emerick, emmerich, friederich, friederike, garverick, giegerich, gingerich, gregorich, helmerich, hemmerich, honderich, kanarek, kasparek, kasperek, kauzlarich, leverich, limerick, maverick, millerick, minarik, pekarek, phosphoric, puskarich, rhetoric, safarik
Klapperich sounds like:
kelberg, kelberg's, kilburg, kjellberg, kohlberg, kohlberg's, kolberg, kullberg