Robert, Count of Clermont
Robert, Count of Clermont was the sixth son of French King Louis IX and the younger brother of Philip III of France. In 1279, due to him suffering a head injury in his first jousting tournament, Robert became an invalid for the rest of his life. After Henry III of France was assassinated in 1589 and the House of Valois ran out of males (since females and female-line descendants of French royalty could not inherit the French throne), Henry IV of France became the first French King from the House of Bourbon due to his male-line ancestry from Robert, Count of Clermont.