Guy XVI de Laval
Guy XVI, Count of Laval, Mayenne was a member of the House of Laval. He was christened Nicolas, but upon inheriting the title, he took the required name of Guy, as his predecessors had done. He was the son of Jean de Laval, who was the brother of Guy XV and the son of Guy XIV and Isabella of Brittany. Descended from royalty, he was the ancestor of kings of France and Belgium through his daughter Anne, and ancestor of William III of England through his daughter Charlotte.
He was born Nicolas de Laval, lord of La RocheBernard. He spent much of his youth at the court of his kinsman, Francis II, Duke of Brittany, where he became close with the Dukes daughter, Anne. When Francis died and Anne married Charles VIII of France, Nicolas followed her to the royal court, where they remained close. The queen became godmother to his daughter Anne.
Source: Wikipedia