Merline rhymes with:
earline, erline, lurline, pearline, angeline, bauerlein, beyerlein, bierlein, boline, bowline, doralynne, earline, edeline, eline, emelyne, erline, ernaline, exline, geosyncline, gosline, hadline, hertlein, idaline, juline, lurline, meline, michaeline, movieline, oehrlein, pearline, sheline, stenglein, timeline
Merline sounds like:
maralina, maraline, marilin, marilyn, marilynn, marleen, marleene, marlen, marlena, marlene, marlin, marlon, marylin, merlin, merlina, merlino, morillom, morillono, morlan, munnerlyn, myrlene