From Kipchak كویاگو (küyägü), from Proto-Turkic *küdegü.
кӱйӱ • (küyü)
N. A. Baskakov, Toščakova N.A, editor (1947), “кӱйӱ”, in Ojrotsko-Russkij Slovarʹ [Oyrot-Russian Dictionary], Moscow: M.: OGIZ, →ISBN