Tags: Noble.
Count William IV of Henneberg-Schleusingen (c.1475 – 24 January 1559) a member of the House of Henneberg was a ruler of the County of Henneberg within the Holy Roman Empire.The son of William III of Henneberg William inherited the County of Henneberg on 26 May 1480 when his father died and reigned until his own death nearly eighty years later on 24 January 1559.He married Anastasia of Brandenburg a daughter of Albert Achilles Elector of Brandenburg.In 1543–1544 William embraced the Protestant Reformation.