INDOS was a River-God of southern Karia, in Anatolia (modern Turkey).

The River Indos flowed into the Aegean Sea near the town of Kaunos, on the Karian mainland opposite the island of Rhodes. The most important neighbouring rivers were the Maiandros to the north, and Lykian Xanthos in the south-east.

Pseudo-Hyginus, Preface (trans. Grant) (Roman mythographer C2nd A.D.) :
"From Oceanus and Tethys [were born] the Oceanides . . . Of the same descent Rivers: Strymon, Nile, Euphrates, Tanais, Indus, Cephisus, Ismenus, Axenus, Achelous, Simoeis, Inachus, Alpheus, Thermodon, Scamandrus, Tigris, Maeandrus, Orontes."

Sources:

• Hyginus, Fabulae - Latin Mythography C2nd A.D.