Nellwyn rhymes with:
delwin, delwyn, elwin, selwin, selwyn, alwin, alwyn, aylwin, delwin, delwyn, elwin, selwin, selwyn, walwyn
Nellwyn sounds like:
nealon, neilan, nelina, nelliana, nelon, newlan, newlin, newlon, newlun, newlyn, neylon, nilan, nolan, nolana, nolen, nolin, nollan, nowlan, nowlin, nyholm, nylen, nylon