Yollıg Khagan (Old Turkic: 𐰖𐰆𐰞𐰞𐰃𐰍:𐱅𐰃𐰏𐰤 Pronunciation: Yollıg Tigin, Chinese: 伊然可汗; pinyin: Yīrán Kèhán, personal name: Chinese: 阿史那伊然; pinyin: Āshǐnà Yīrán; 734–739?) was the fifth ruler of the Second Turkic Khaganate. He was Bilge Khagan's son. Besides being author of Orkhon Inscriptions, nothing much is known about him. His wife Yusaifu left for Tang after 744.