prince John Komnenos

-http://fmg.ac/Projects/MedLands/BYZANTIUM%2010571204.htm#Andronikos...

2. IOANNES Komnenos ([1158/59]-murdered 1185). Niketas Choniates names "Iohannes et Manuel" as the two sons of "Andronici" when recording that "protosebastus" put them in chains during the reign of Emperor Alexios but were released from prison[487]. In an earlier passage, Niketas Choniates names "Iohanne" as the son of Andronikos Komnenos by his legitimate wife and states that he was taken to Emperor Manuel at Constantinople[488]. His father declared him heir to the imperial throne in 1183.