Etymology

Compare Persian جوی ‎(juy, “stream”), جوب ‎(jub, “stream”), جو ‎(ju, “stream”). From Middle Persian [script needed] ‎(joi) or [script needed] ‎(yoi), from Old Persian [script needed] ‎(yauviya), cognate with Kurdish co and Sanskrit यव्या ‎(yavyā).