From *birägü (“one of a group; somebody”), from Proto-Turkic *bīr (“one”).
Cognate with Old Uyghur (birägü, “one of a group; someone”); Turkish birey, Kazakh біреу (bıreu), Kyrgyz бирөө (biröö, “one (of several); someone, something”), Tatar берәү (beräw, “one (of several); one piece”), Karachay-Balkar биреу (birew, “somebody”), Kumyk бирев (birew, “somebody”), Uzbek birov (“one; someone”).
бирӱ • (birü)
N. A. Baskakov, Toščakova N.A, editor (1947), “бирӱ”, in Ojrotsko-Russkij Slovarʹ [Oyrot-Russian Dictionary], Moscow: M.: OGIZ, →ISBN
Čumakajev A. E., editor (2018), “бирӱ”, in Altajsko-russkij slovarʹ [Altaic–Russian Dictionary], Gorno-Altaysk: NII altaistiki im. S.S. Surazakova, →ISBN