Arthur Dreux, II Duke of Brittany was born on 25 Jul 1262 in Rennes, Rennes, Ille-et-Vilaine, Bretagne, République française; died on 27 Aug 1312 in Île-de-France, République française.
John Dreux, IV Duke of Brittany was born in 1295 in Hennebont, Morbihan, Bretagne, République française; died on 16 Sep 1345 in Hennebont, Morbihan, Bretagne, République française.