（*Kersoble/pths), was son of Cotys, king of Thrace, on whose death in B. C. 358 he inherited the kingdom in conjunction with Berisades and Amadocus, who were probably his brothers.
He was very young at the time, and the whole management of his affairs was assumed by the Euboean adventurer, Charidemus, who was connected by marriage with the royal family, and who bore the prominent part in the ensuing contests and negotiations with Athens for the possession of the Chersonesus, Cersobleptes appearing throughout as a mere cipher. (Dem. c. Aristocr. pp. 623, &c., 674, &c.)
The peninsula seems to have been finally ceded to the Athenians in B. C. 357, though they did not occupy it with their settlers till 353 (Diod. 16.34); nor perhaps is the language of Isocrates (de Pac. p. 163d. mh\ ga\r oi)/esqe mh/te *Kersoble/pthn, k. t. l.) so decisive against this early date as it may appear at first sight, and as Clinton (on B. C. 356) seems to think it. (Comp. Thirlwall's Greece, vol.