Chizhishizhuhou Chanyu
The southern Xiongnu were a branch of the eastern Xiongnu that followed the rebellious pretender Huhanye and in 51-53 BC moved en masse within the Han borders under protection of Chinese. Since the times of Huhanye, the status of the southern Xiongnu was loyal allies of the Han Dynasty. The southern Xiongnu enjoyed material support of the old "heqin" treaty, and in return guarded the Chinese northern borders and participated in the Chinese external and internecine conflicts as long as the Chinese court respected their independence. However, when the Han imperial court attempted to appoint an ineligible for the crown Western Jükü-Prince Yufuluo from ineligible Right Wing as a Chanyu, instead of respecting the traditional election, the southern Xiongnu dissented and elected a lawful alternate Hyuibu Gudu-heu. Later they expelled Yufuluo, who had to seek safety in exile at the Han imperial court.
Xiongnu
Attempts to identify the Xiongnu with later groups of the western Eurasian Steppe remain controversial. Scythians and Sarmatians were concurrently to the west. The identity of the ethnic core of Xiongnu has been a subject of varied hypotheses, because only a few words, mainly titles and personal names, were preserved in the Chinese sources. The name "Xiongnu" may be cognate with that of the Huns or the "Huna", although this is disputed. Other linguistic links – all of them also controversial – proposed by scholars include Iranian, Mongolic, Turkic, Uralic, Yeniseian, Tibeto-Burman or multi-ethnic.