John VI (died 1120 or 1123) was the Duke of Naples from 1097 or 1107 to his death. He was the son and successor of Sergius VI. His reign is very obscure on the basis of slight documentary evidence.
John VI, who passed away between 1120 and 1123, ruled as Duke of Naples from either 1097 or 1107 until his death. He succeeded his father Sergius VI and left behind a remarkably unclear historical record.