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Halil Bey (1347 – 1362; Ottoman Turkish: شاھزادہ خلیل) was an Ottoman prince, son of Orhan, the second bey of the Ottoman beylik, and Theodora Kantakouzene, the daughter of Byzantine emperor John VI Kantakouzenos and Irene Asanina. His kidnapping was an important event in 14th century Ottoman-Byzantine relations. He was executed by his half-brother Murad I.