From Proto-Albanian*reð, from Proto-Indo-European*sr-ed(h) 'to whirl, bubble, stream'[1] or Proto-Indo-European*Hreǵ- ‘to flow’. Compare Latin rigāre ‘to wet’, Lithuanian rõki ‘drizzle’, and also Old English rīð, rīðe(“stream, brook”), Middle Low German rīde(“stream, brook, watercourse”). Possibly related to Illyrian deity Redon and Celtic Rodanos (hydronym)(Can this(+) etymology be sourced?).