The river Tanais; the Don
Latin word, found 49 times in the texts on Socratos.
Vergil, Georgics 4.517: Solus Hyperboreas glacies Tanaimque nivalem
Ovid, Heroides 6.107: Illa sibi a Tanai Scythiaeque paludibus udae
Ovid, Metamorphoses 2.242: tuta manent: mediis Tanais fumavit in undis