Delphax rhymes with:
alumax, amax, anthrax, apacs, betamax, bodziak's, broadnax, brodnax, cinemax, cossacks, feltrax, horvac's, ivax, kayaks, kazakhs, kovacs, kovaks, mulanax, mullinax, nasdaq's, novak's, paramax, pasternak's, pedophiliacs, prothorax, slovaks, thorax, truax, vegisnax, votrax, winamac's, xanax, zovirax
Delphax sounds like:
dalbec, dalpiaz, dealfish, delapaz, delavega, delbosque, delfosse, delfs, dellavecchia, delphic, delpizzo, delpozo, delvecchio, delves, dethlefs, dilbeck