Qin dynasty
Note: King Zhaoxiang of Qin (秦昭襄王) had already been ruling Qin for 51 years when Qin annihilated the Zhou dynasty; however the other six warring states were still independent regimes. Some Chinese historiographers thus used the next year (the 52nd year of King Zhaoxiang of Qin) as the official succession from the Zhou dynasty.
Duke Zhuang of Qin
Duke Zhuang became the Qin ruler after his father Qin Zhong was killed in battle against the Rong tribes in 822 BC. King Xuan of Zhou gave Duke Zhuang and his four younger brothers seven thousand soldiers, and they defeated the Rong. King Xuan then awarded Qin the territory of Quanqiu (犬丘, also called Xichui, in present-day Li County, Gansu), formerly belonging to the senior branch of the House of Ying that was destroyed by the Rong, and Duke Zhuang moved the capital of the state from Qin (in present-day Zhangjiachuan County, Gansu) to Quanqiu.