Kochbeychay is a river in the Sharur-Daralayaz uezd of the former Iravan governorate, later in the former Pashali (Azizbeyov, Vayk) district, and currently in the Vayots Dzor province. It flows through the village of Kochbak (Ughedzor).

The hydronym was coined by combining the words “kosh (koch)” meaning in Turkic “a camp, a temporary living place of shepherds and “bak” meaning in Old Turkic “a hill”.