Ernest

Ernest (1373 – 2 July 1438) was a Duke of Bavaria and father of Albert III of Bavaria.

When Ernest found out that his son’s mistress is a witch, he was so disgusted that he ordered her execution and she was eventually drowned in Danube.

Etymology
Ernest’s name is derived from Germanic word ernst "bold, vigorous, resolute".

Behind the scenes

 * Ernest was a real person. He was a Duke of Bavaria 1397 – 1438. His wife was Elisabetta Visconti, who bore him son Albert.