Contemporary Ottoman documents refer to him as Yuvan, to his lands as Yuvan-ili while his son George was referred to as Iskender Bey Yuvan Oglu. Giovanni Musachi (fl. 1510) in his work written in Italian, calls him Giovanni, which is also used by Demetrio Franco (1443–1525).
Contemporary Ottoman records identify him as Yuvan, referring to his lands as Yuvan-ili while his son George was referred to as Iskender Bey Yuvan Oglu.  Giovanni Musachi (fl. 1510) in his Italian work calls him Giovanni, which is also used by Demetrio Franco (1443–1525).