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.
Chanyu
Chanyu (; short form for Chengli Gutu Chanyu ()) was the title used by the nomadic supreme rulers of Inner Asia for eight centuries and was superseded by the title ""Khagan"" in 402 CE. The title was used by the ruling Luandi clan of the Xiongnu during the Qin dynasty (221-206 BCE) and Han dynasty (206 BCE–220 CE).
According to "Book of Han", Chēnglí 撐犁 means "heaven", gūtu 孤塗 "son" and chányú 單于 "immense appearance".