(Γῆλαι /Gēlai, Str. 11,5,1, cf. 11,7,1; 11,8,1; Γηλύς /Gēlýs, Steph. Byz. s.v. Γ.; Γηλοί /Gēloí, Dionys. Per. 1019 [GGM II, 167]). Median tribe of Scythian origins, first mentioned by Strabo (according to Theophanes of Mytilene), who inhabited the south-western shores of the Caspian Sea. Some ancient authors (Plin. HN 6,48; Ptol. 6,2,5) identified them with the Cadusii. The tribe's name lives on in the region's (or rather the Sassanid province's) modern name of Gı̄lān (middle Persian Gēlān).
Bibliography
R. Gyselen, La géographie a…