Just one King

As early as 411 BC, Amyrtaeus, a native Egyptian, revolted against Darius II, the Achaemenid Persian King, and the last Pharaoh of the 27th Dynasty. Amyrtaeus succeeded in expelling the Persians from Memphis in 405 BC with assistance from Cretan mercenaries, and in 404 BC, following the death of Darius, proclaimed himself Pharaoh of Egypt. The Twenty-Eighth Dynasty consisted of a single king, Amyrtaeus only, prince of Sais, this dynasty reigned for six years, from 404 BC–398 BC.