Shahzade Khalil of Bithynia

In 1356, Khalil, the son of Emperor Orhan I of the Ottoman Empire and Theodora, was being taken round the Bay of Izmit on a boat. A Geneose commercial boat captain, who was conducting piratical acts, was able to capture the young prince and take him over to Phocea on the Aegean Sea, which was under Genoese rule. Orhan was very much upset by this kidnapping and conducted talks with his brother-in-law and now single Byzantine Emperor John V Palaeologos. As to the agreement, John V with a Byzantine naval fleet went to Phocea, paid the ransom demanded of 100,000 Byzantine gold pieces, and brought Khalil back to Ottoman territory.

Halil married his 1st cousin, Eirene Palaiologina, who was a daughter of John V Palaeologus and Helena Kantakouzene.