"Хан" is a title used historically in Central Asia and parts of Eastern Europe, denoting a ruler or leader, often associated with the Mongol Empire and Turkic tribes. The term signifies authority and governance, typically over a territory or group of people. In the context of the Mongol Empire, a хан was responsible for maintaining order, leading military campaigns, and managing trade. The title has also been used in various cultures, reflecting a similar role of leadership and power, such as in the Khanate of Kazan and other regional states.