Eyrisu was a winter pasture located in the territory of the Gazakh uezd of the former Yelizavetpol governorate, later in the former Chambarak (Krasnoselsk) district, near the village of Chaykend (Dprabak) and present-day Gegharkunik province.

The pasture was inhabited by eight Azerbaijanis in 1926. It was dissolved in the 1930s.

The toponym was coined by combining the word “eyri” used in the sense of “distorted, curved, twisted” and the word “su” used in the sense of “a river” in Turkic. It means “a settlement near a twisted river”.