İbrahim Bey (Abraham)

İbrahim Bey (c. 1310–1362) was the eldest son of Sultan Orhan by his Byzantine-born wife Asporça Hatun. In the waqf his mother founded in September 1323, the oldest surviving Ottoman document, he was named administrator of her landed endowments.

He later served as governor of Eskişehir. After Orhan's death in 1362, he and his sons were put to death on the order of his half-brother, the new sultan Murad I, and he was buried in Osman I's tomb in Bursa.