János IX

János IX (János Zgismond Esterházy; B. 1720) is a claimant of the Throne of the Empire and is the designated heir of the former emperor, Zgismond I before the start of the Imperial Civil Dispute. János IX was given an official coronation ceremony, however his position as Emperor is disputed by his brother and sister, Miklós Esterházy, Alispán of Zamárdi and Katalin Esterházy, Alispán of Látrány.

János was born in the Zamárdi Palace in the Imperial Megye of North Balaton to his father, Emperor Zgismond I and his wife, Katarína. Zgismond had at this point just ascended the throne, and János became the heir apparant. At 10, János was titled as the Alispán of Gyenesdiás and lived with his aunt Ispán Szabó. János later attended the University of Esztergom and subsequently became a soldier in the Imperial Army during the Hódítók Disunity, which began close to the end of his father's reign in 1739. When Zgismond I passed away in 1742, János was subsequently announced to be new Emperor. His initial reign was mired in issues that were preceded by Zgismond I's death, including the aftermath of the Hódítók Disunity and the challenges to his reign by his siblings. Despite having been given a full coronation ceremony that legitimized his power, both of his siblings have questioned his legitimacy as a true heir of Zgismond I.