Rudolph (also Radulf, Ralph, or Raoul) ("c." 890 – 15 January 936) was the Duke of Burgundy between 921 and 923. He was King of France from July 13, 923 until his death. He married Emma of France, daughter of Robert I of France and Béatrice of Vermandois. The nobles elected him King of France after his father-in-law died.