Guido married Marguerite De Valois about 06 Oct 1310. Marguerite (daughter of Prince of France CHARLES CAPET, I and Marguerite Princess of Sicily and Naples MARAGARET) was born about 1295 in Fontainebleau, Seine-et-Marne, ÃŽle-de-France, France; died in Jul 1342. [Group Sheet] [Family Chart]