 Duke of Trakai was an important position held either by the Grand Duke himself or his second-in-command.Therefore, 18th- and 19th-century historians believed that it was Gediminas himself who died at Bayernburg.Nikžentaitis further postulates that the name of the unknown son might have been Vytautas, as records mention a young and powerful Yuri, son of Vytautas and deputy of Andrei, son of Algirdas.