İstemihan is a common masculine Turkish given name. It is composed of two Turkish words: "İstemi" and "Han". "İstemi" means "Conquerror of the Sky" and it is a given name on its own whereas "Han" means "Ruler" or "King". Thus, "İstemihan" means "Conquerror of the Sky" or "Ruler of the Sky".
People İstemihan Kapar, a Turkish author (see Turkish Wikipedia article). İstemi Khan, the Yabgu (ruler) of the western part of the Göktürks, the Western Turkic Khaganate (Celestial Turks). İstemihan Taviloğlu, a Turkish composer and a music educator. İstemihan Talay, former Minister of Culture of Turkey .