Lan (tribe)The Lan tribe was one of the five member tribes of the Xiongnu people who lived during the Han dynasty in Northern Wei.HistoryThe Xiongnu people had five tribes: Luandi, Xubu, Huyan, Lan, and Qiulin. According to the Chinese assimilation policy of Xiaowen, the Xiongnu of Lan get the surname Lan. Their families are part of the Liu family of Han-Zhao.