Kağan
Kağan means 'supreme ruler' or 'sovereign' in Old Turkic. It was the highest imperial title in the Turkic and Mongolic world, ranking above the ordinary Khan.
The Khagan title was used by the rulers of the Göktürk Khaganate, the Avar Khaganate, the Khazar Khaganate, and later by the Mongol emperors. It signified the supreme ruler of a Turkic or steppe empire.
Kağan is a moderately popular name in Turkey, especially among families who take pride in pre-Islamic Turkic history and want to honor their ancestral heritage.
The Turkish letter 'ğ' (soft g) is nearly silent and serves mainly to lengthen the preceding vowel. In Kağan, it elongates the 'a,' making the pronunciation approximately 'KAH-ahn.'
Names with similar Turkic leadership themes include Timur (iron), Tuğrul (falcon), Alp (hero/brave), and Çağatay (ruler of the age), all deeply rooted in Turkic historical tradition.