Borrowed from Latin Indus, from Ancient Greek Ἰνδός, from Old Persian 𐏃𐎡𐎯𐎢𐏁, from Proto-Iranian *hínduš (compare Avestan 𐬵𐬌𐬧𐬛𐬎), from Proto-Indo-Iranian *síndʰuš or borrowed from Sanskrit सिन्धु (whence Sindh).
Named by Dutch explorers Pieter Dirkszoon Keyser and Frederick de Houtman between 1595 and 1597. From Latin Indus, commemorating American Indians.