Duke Huan of Qi

Names
	Ancestral name: Jiang (姜); Clan name: Lü (呂); Given name: Xiaobai (小白);

Duke Huan of Qi
齊桓公
Duke Huan of Qi; 齊桓公
	Duke Huan of Qi (middle) and Guan Zhong (right) depicted on Wu family shrines stone-relief.
Ruler of Qi
Reign	685–643 BC
Predecessor	Wuzhi
Successor	Wukui
Died	643 BC
Spouse	Wang Ji; Xu Ying; Cai Ji;
Issue	Wukui, Duke of Qi; Duke Hui of Qi; Duke Xiao of Qi; Duke Zhao of Qi; Duke Yì of Qi; Qi Jiang;
Names
Names
	Ancestral name: Jiang (姜); Clan name: Lü (呂); Given name: Xiaobai (小白);
House	House of Jiang
Father	Duke Xi of Qi
Mother	Wey Ji

Duke Huan of Qi (Chinese: 齊桓公; pinyin: Qí Huán Gōng; died 643 BC), personal name Xiǎobái (小白), was the ruler of the State of Qi from 685 to 643 BC. Living during the chaotic Spring and Autumn period, as the Zhou dynasty's former vassal states fought each other for supremacy, Duke Huan and his long-time advisor Guan Zhong managed to transform Qi into China's most powerful polity. Duke Huan was eventually recognized by most of the Zhou states as well as the Zhou royal family as Hegemon of China. In this position, he fought off invasions of China by non-Zhou peoples and attempted to restore order throughout the lands. Toward the end of his more than forty-year-long reign, however, Duke Huan's power began to decline as he grew ill and Qi came to be embroiled in factional strife. Following his death in 643 BC, Qi completely lost its predominance.