In 1805 Pierre Caze advanced the suggestion that Joan of Arc was the illegitimate child of Queen Isabeau of Bavaria and the Duke of Orleans. He believed this explained King Charles VII's trust in her.

You do not know Joan of Arc, you have no right to ask this. Unless, you are truly wondering. But if you are doing it for jokes or laughs or you were just plain bored. Then, my friend, you are just plain wrong. Joan of Arc is a special time in history as well as a tragedy. You must not say these things. Would you like it in a few hundred years after you became famous and someone asked whether out loud or online isnt (your name) a royal pain in the tush? I think not...