Etsu rhymes with:
keiretsu, settsu, umetsu, agematsu, daihatsu, dentsu, fujitsu, keiretsu, norimatsu, settsu, toshimitsu, umetsu
Etsu sounds like:
eades, eads, eads', eats, ed's, eddie's, eddies, edds, edes, edge, edges, edgeway, edgeways, edgewise, edgy, edick, edits, etc, etch, etches, etess, ethic, ethics, ethos, etudes, eudocia, eudosia, eudoxia, eutsey, eyetech, eyetech's