Ininthimeus is variously thought to have been either a member of the ruling Tiberian-Julian dynasty (perhaps the son of Cotys III)[4] or a foreign usurper, perhaps of Sarmatian descent.

[6] The French genealogist Christian Settipani believes Rhescuporis V to have been born c. 225 as the son of the previous king Sauromates III (r. 229–232).

[3] Whether Pharsanzes was a usurper or not is disputed, though he is most frequently believed by historians to have been a rival contender rather than a co-ruler,[8] perhaps a closer relative of Ininthimeus or an unrelated foreigner.

This inscription was read as "Synges" by the numismatist Bernhard Karl von Koehne in the mid-19th century but was considered fanciful by Aleksandr Zograf in 1977.

[9] More securely attested co-rulers are known from Rhescuporis V's final year, 276, when he ruled together with the two other kings Teiranes and Sauromates IV.