Both of them became kings of France . They also had two daughters : Hildegarde ( born in 864 ) and Gisela ( 865 â `` 884 ) . Twice married , he and his first wife , Ansgarde of Burgundy , had two sons : Louis ( born in 863 ) and Carloman ( born in 866 ) , both of whom became kings of France , and two daughters : Hildegarde ( born in 864 ) and Gisela ( 865 â `` 884 ) , who married Robert , Count of Troyes .