Antonio died still in power in January 1435 without legitimate children and his succession to the duchy was disputed between his nephews Nerio II and Antonio II, and his widow (Maria Melissene?).
Antonio morreu no poder en xaneiro de 1435 sen fillos lexítimos e a súa sucesión ao ducado foi disputada entre os seus sobriños Nerio II e Antonio II, e a súa viúva (María Melissena).