Muhan Khan (other spellings include Muhan, Mohan, Mukan, Mukhan, Mokhan, Sijin, Muchu Qaghan, Bek Khan, 木杆) was the second son of Bumin Khan and the third khagan of the Göktürks who expanded their empire and secured the borders against the Hephthalites. Bumin Khan (death 552 AD was the founder of the Göktürk Empire. For other titles related to and uses of Khan, see that article Origin The title Göktürks ( Turkish: Gök Türkler) were a Turkic people of ancient Central Asia. The Hephthalites or White Huns were a Central Asian Nomadic confederation whose precise origins and composition remain obscure
Muhan's reign marked the pinnacle of Sogdian cultural influence in the Göktürk Empire. Göktürks ( Turkish: Gök Türkler) were a Turkic people of ancient Central Asia. Sogdian culture was transmitted by merchants from Turpan who worked as ambassadors and advisers. Turfan Prefecture ( simplified Chinese: 吐鲁番地区 Pinyin: Tulufán Dìqū تۇرپان ۋىلايىتى|Turpan Wilayiti|Turpan Vilayiti is located in The Sogdian language and script were used to govern the empire. The Sogdian language is a Middle Iranian language that was spoken in Sogdiana ( Zarafshan River Valley located in modern day Uzbekistan
After Muhan's death the title of khagan passed to his younger brother Taspar. Taspar Khan ( Tabo Tuobo Tapo Khan, 佗鉢 was the third son of Bumin Khan and Wei Changle (長樂公主 and the fourth Khagan of the first Göktürk His daughter Empress Ashina was the wife of Emperor Wu of Northern Zhou. Empress Ashina (阿史那皇后 personal name unknown (551-582 was an Empress of the Chinese / Xianbei dynasty Northern Zhou. Background Yuwen Yong was born in 543 as the fourth son of the Western Wei paramount general Yuwen Tai.