Suleyman ibn. Süleyman Çelebi (also Emir Süleyman; d. 17 February 1411) was an Ottoman prince (şehzade) and a co-ruler of the Ottoman Empire for several years during the Ottoman Interregnum. He fought both in the Battle of Nicopolis (1396) against the Crusaders and the Battle of Ankara (1402) against Timur.