[German version] River, mentioned only in Plin. HN 6,99, which flowed into the Persian Gulf. Presumably identical to the Or(o)atis, named in Plin. HN 6,111; 136 as the border river between Persis and Elymais (cf. Ptol. 6,3,1; 6,4,1 f.:
Oroátis; Amm. Marc. 23,6,26:
Oroates; modern Šūr Āb) or the Arosis, described in Arr. Ind. 39,9 as the border between the Persians and the Susians (modern Zohre/Hendīǧān). Wiesehöfer, Josef (Kiel) Bibliography
1 M. G. Schmidt, Die Nebenüberlieferung des 6. Buchs der 'Geographie' des Ptolemaios, 1999, 25 f.