The city has been known by other names: Kiejdany in Polish, Keidan (קיידאן) in Yiddish,[3][4] and Kedahnen in German. Kėdainiai other alternate forms include Kidan, Kaidan, Keidany, Keydan, Kiedamjzeÿ [5] ("j" /e/), Kuidany, and Kidainiai.[6]