Willem III of Euphrania (18 May 1582 - 27 April 1625) was King of Euphrania (as Willem III in Euphrania and Willem II in Ptolemaia). The seventh member of the House of Oranje-Burgundy to succeed to the throne of Euphrania, Willem II was born in Pyrus to King Frederick II of Euphrania. Willem III was known in Euphrania as Willem the Pious as well as abroad. Willem III having earned the nickname "Willem the Pious" for his total apparent absence of vice, rather than any pious related activities as would be expected. However Willem III conducted the kingdom though several wars and his reign was a critical point in the history of Euphrania.