吐𠔌渾
(?
597年～
635年)
伏允（？－635年），即
慕容伏允，吐𠔌渾統治者，他為誇呂的兒子，世伏的弟弟。597年，吐𠔌渾內亂，世伏被殺，伏允繼位，為步薩鉢可汗。伏允依照吐𠔌渾習俗娶世伏天後隋朝宗室女光化公主為妻，隋文帝應允了。此後，吐𠔌渾年年朝貢不絶。但伏允常打聽隋朝的情報，隋文帝非常厭惡。隋煬帝即位後，607年，伏允派使者和高昌、突厥一起嚮隋朝朝貢。
隋朝大臣裴矩出使西域回來，建議隋煬帝控製西域，首先要消滅吐𠔌渾。這時，伏允和光化公主的兒子慕容順正在隋朝交聘，被隋煬帝扣留。608年，裴矩指使鐵勒攻擊吐𠔌渾，伏允大敗，來到隋朝的西平郡（今青海省樂都），隋煬帝派安德王楊雄出澆河，許公宇文述出西平接應。伏允恐懼宇文述兵強，帥衆西逃，宇文述引兵追擊，攻剋曼頭、赤水二城，斬首三千餘級，虜獲吐𠔌渾貴族二百，百姓四千。伏允南奔雪山，其故地東西四千裏，南北二千裏，皆為隋朝占有。609年，伏允想重返故地，五月，隋煬帝親徵吐𠔌渾，伏允敗走，隋朝吐𠔌渾在故地設置西海、河源、鄯善、且末等郡。隋煬帝封慕容順為可汗，其大寶王尼洛周為輔。可是，慕容順剛到達西平郡，尼洛周被部下所殺，慕容順不果而還。之後，隋朝在615年之後陷入崩潰局面，伏允又恢復了吐𠔌渾汗國。
唐朝建立後，唐高祖聯合伏允夾擊河西的李軌。唐高祖作為回報，將從江都逃回的慕容順送歸吐𠔌渾。622年之後，伏允聽信天柱王的建議，屢次侵犯唐朝的西部邊境，唐朝派大將柴紹反擊。這樣的侵擾持續了將近十年。634年，扣留唐朝使者趙德楷，六月，唐太宗以左驍衛大將軍段志玄為西海道行軍總管、左驍衛將軍樊興為赤水道行軍總管，討伐伏允，十二月，又以特進李靖為西海道行軍大總管，兵部尚書侯君集為積石道、刑部尚書任城王李道宗為鄯善道、涼州都督李大亮為且末道、岷州都督李道彥為赤水道、利州刺史高甑生為????澤道行軍總管，大舉討吐𠔌渾。635年，伏允敗走，被部下所殺（《舊唐書》、《新唐書》說是自殺）。
Minister of the Han Dynasty Sui Pei Ju back control of the proposed Western Emperor, first of all to destroy Tuyuhun. At this time, Fu Yun and photochemical Murong Shun is the son of Princess Engagement Sui Dynasty was Emperor detained. 608, Pei Ju ordered Tiele attack Tuyuhun, Fu Yun defeated, came to the West Heguri Sui (Qinghai this music are), Andrew Wang Yang Xiong, the Emperor sent poured River, Xugong Yu Wen described the collusion of the Western level. Fu Yun fear Yuwen Shu soldiers strong, Shuaizhong West to escape, Yuwen Shu led his troops to pursue, attack Blackman head, Chishui Second City, beheading three thousand level, capture Tuyuhun aristocracy 200, population 4000. Fu Yun Lamphun snow, something of its old haunt four miles, two miles north and south are all Sui possession. 609, Fu Yun want to return to the old haunt, in May, a personal expedition Tuyuhun Emperor, Fu Yun defeated, Sui Tuyuhun set in familiar places, the West Sea, Heyuan, Shanshan, Qiemo other counties. Emperor Shun Feng Murong to Khan, the great Po Wang Niro week supplement. However, Murong Shun arrived Darcy Heguri, Niro week was killed by his men, but also to no avail Murong along. After the Sui Dynasty in 615 years after the collapse situation, Fu Yun resumed Tuyuhun Khanate.