The Byzantiná of Diadochia is the earliest title created for the wife of the Crown Prince or Byzantinóu of Diadochia (the heir apparent to the Diadochian throne). The position was the first of many granted to the wife of the heir apparent to the Diadochian throne. The title was first created in 659 AD for Crown Princess Maria Gregoria Niketas wife of the future (Cassander IV of Diadochia)