 The Great Soviet Encyclopedia classes them as a tribe of the Maeotae.The Cambridge Ancient History refers to the Sindi as a Scythian people dominant among the Maeotians, whom it considers as either of Cimmerian ancestry or as Caucasian aboriginals under Iranian overlordship.In the 4th century BC, the Sindi were the people inhabiting the Sindike Kingdom, which were under the rule of Hekataios and his wife Tirgatao until the latter was dethroned.