Analysis of information sources in references of the Wikipedia article "Gepaepyris" in English language version.
On his death Aspurgus left his wife Gepaepyris, and two sons, Mithridates and Cotys. Gepaepyris succeeded her husband as sole ruler, and inscribed her coins ΒΑΣΙΛΙΣΣΗΣ ΓΗΠΑΙΠΥΡΕΩΣ.
Meanwhile, gold and bronze coins of Gepaepyris prove her sole rule in Bosporus. There is no mention of Mithridates, and Gepaepyris herself is represented on the obverse as a ruler in full authority.
In AD 39 Mithridates inherited the throne of his mother