Gelae (tribe)
The Gelae, or Gelians, were a Scythian tribe mentioned by Strabo and other ancient writers as living on the southern shores of the Caspian Sea. The name of the province Gilan might possibly be derived from the Gelae. Another hypothesis held by several historians suggests that the Gelae are equivalent to the Galgai, the ancient neighbours of the Legae.
Classical sources
Strabo first mentions the Gelae, along with the Legae, in the fifth chapter of the eleventh book of his Geographica, who according to Theophanes of Mytilene, Pompey's compaignon in his Caucasian campaign in the first century BC, lived between the Amazons and the Albanians, thus, were placed in Northern Caucasus. Plutarch specified that the Amazons did not border on the Albanians but were divided by them from the Gelae and Legae. Therefore, they must have been peoples neighbouring the Albanians, but distinct from them.Strabo's second account of the Gelae, mentions them among the tribes of the southern Caspian which included the Cadusii, Amardi, Witii, and Anariacae, in a manner which does not agree with what he initially says of their position. We must perhaps suppose that this people, in part at least, have changed either changed their place of residence or were perhaps another tribe with a similar name. If, as seems probable, this description accurately represents their distribution from west to east, then the Gelae would have lived directly east of the river Araxes, along the border of Armenia. Their territory is supposed to have been relatively unproductive, of little agricultural or mineral value. Pliny considers the Gelae and the Cadusii to be synonymous, with "Cadusii" being the tribe's name in Greek, and "Gelae" being its eastern equivalent. If he is correct, then it is likely that the name of modern Gilan is derived from the Gelae.
According to the late-classical author Bardaisan, the Gelae who lived along the Caspian, had feminine men and masculine women, like the citizens of Cumae under the tyrant Aristodemus.