Kir

a wall or fortress, a place to which Tiglath-pileser carried the Syrians captive after he had taken the city of Damascus (2Kings 16:9; Amos 1:5; 9:7). Isaiah (Isa 22:6), who also was contemporary with these events, mentions it along with Elam. Some have supposed that Kir is a variant of Cush (Susiana), on the south of Elam.

EBD - Easton's Bible Dictionary