Sons Bayezid I had at least twelve sons:Sakaoğlu 2008, pp.82 Ertuğrul Çelebi (1376 –1400), wali of Aydin. He was born in Küthaya. He took part in the Candar campaign and fought in the Battle of Kirkdilim, on 20 July 1391. He died of unknown causes and was buried in Bursa. Süleyman Çelebi (1377 - 1411). Emir of Rumelia, claimant to the Ottoman throne during the Ottoman Interregnum. İsa Çelebi (1380Sakaoğlu 2008, p.76 - 1403) – with Devletşah Hatun. Governor of Anatolia, claimant to the Ottoman throne during the Ottoman Interregnum. Mustafa Çelebi (1380 – 1402 or 1422?). Claimant to the Ottoman throne during Mehmed I and Murad II's reigns. Musa Çelebi (died in 1413) – with Devletşah Hatun. Emir of Rumelia, claimant to the Ottoman throne during the Ottoman Interregnum. Mehmed I (–1421) – with Devlet Hatun. Governor of Anatolia, he won the civils wars during the Ottoman Interregnum and later became Sultan. Yusuf Çelebi. Süleyman Çelebi sent him as a hostage to Constantinople for order of Manuel II, where he converted to Christianity and changed his name to Demetrios. Kasım Çelebi. Süleyman Çelebi sent him as a hostage to Constantinople together with his full-sister, Fatma Hatun, for order of Manuel II. He had a son, Orhan Çelebi. Hasan Çelebi. Still a child at the time of his father's death, he was killed during the subsequent civil wars between his older brothers. Ömer Çelebi. Korkud Çelebi. Ibrahim Çelebi.
sons bayezid i had at least twelve sonssakaoğlu 2008 pp82 ertuğrul çelebi (1376 –1400) wali of aydin he was born in küthaya he took part in the candar campaign and fought in the battle of kirkdilim on 20 july 1391 he died of unknown causes and was buried in bursa süleyman çelebi (1377 - 1411) emir of rumelia claimant to the ottoman throne during the ottoman interregnum i̇sa çelebi (1380sakaoğlu 2008 p76 - 1403) – with devletşah hatun governor of anatolia claimant to the ottoman throne during the ottoman interregnum mustafa çelebi (1380 – 1402 or 1422) claimant to the ottoman throne during mehmed i and murad ii's reigns musa çelebi (died in 1413) – with devletşah hatun emir of rumelia claimant to the ottoman throne during the ottoman interregnum mehmed i (–1421) – with devlet hatun governor of anatolia he won the civils wars during the ottoman interregnum and later became sultan yusuf çelebi süleyman çelebi sent him as a hostage to constantinople for order of manuel ii where he converted to christianity and changed his name to demetrios kasım çelebi süleyman çelebi sent him as a hostage to constantinople together with his full-sister fatma hatun for order of manuel ii he had a son orhan çelebi hasan çelebi still a child at the time of his father's death he was killed during the subsequent civil wars between his older brothers ömer çelebi korkud çelebi ibrahim çelebi