Rouran Khaganate
The Rouran Khaganate (Chinese: 柔然; Róurán), also known as Ruanruan or Juan-juan (蠕蠕; Ruǎnruǎn) (or variously Jou-jan, Ruruan, Ju-juan, Ruru, Ruirui, Rouru, Rouruan or Tantan), was a tribal confederation and later state. The Rouran state was undoubtedly multi-ethnic, as the ancient sources regard the Rouran as a separate branch of the Xiongnu.