a contemporary of Caracalla and Alexander Severus, whose heads appear on his coins.
There was also a Rhescuporis IV., who was a contemporary of Valerian, and a Rhescuporis V., a contemporary of Constantine the Great.
William Smith. A Dictionary of Greek and Roman biography and mythology. London. John Murray: printed by Spottiswoode and Co., New-Street Square and Parliament Street. In the article on Soranus, we find: "at this present time (1848)" and this date seems to reflect the dates of works cited. 1873 - probably the printing date.