Иоанн Дука
Nevertheless, Isaac Angelos still suspected him of imperial ambitions, especially due to his uncle's close contacts with the general Alexios Branas, who had rebelled in 1187: shortly before the general's rebellion, John Doukas had wed his eldest son Isaac with one of the general's daughters. Whatever the truth of Isaac Angelos' suspicions, John was quick to recognize his other nephew Alexios Angelos, when the latter usurped the throne in April 1195, and played a prominent role in Alexios' coronation ceremony. John Doukas is mentioned for the last time in 1199, when the death of both of Alexios III's sons-in-law, Andronikos Komnenos and Isaac Komnenos, opened the issue of the succession, as Alexios III had no male descendants. Despite his age, John Doukas apparently still hoped to rise on the throne, leading to quarrels with another of his nephews, Manuel Kamytzes, and the other imperial relatives. John Doukas probably died soon after that, , at a very advanced age for his time.