Because, for a very long time, the West only knew of Persian historical figures through Greek sources. And even if they didn’t, the prestige of Greek and Latin meant that names mediated thorough those languages were more familiar. Thus, Cyrus, Ramses, and Moses.
Iotabe is identified tentatively with Tiran Island, 27°57′N 34°33′E
Syene is Aswan, 24°05′20″N 32°53′59″E
Berenice Troglodytica is 23°54′38″N 35°28′34″E
So Iotabe is not the southernmost point, unless Dimitris has evidence for an alternate identification of Iotabe as being south of Aswan.
Booooring… another LibLeftie:
Economic Left/Right: -3.13
Social Libertarian/Authoritarian: -5.64