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 Jing of Qin
Duke Jing of Qin (, died 537 BC) was from 576 to 537 BC the eighteenth ruler of the Zhou Dynasty state of Qin that eventually united China to become the Qin Dynasty. His ancestral name was Ying (嬴), and Duke Jing was his posthumous title. Duke Jing succeeded his father Duke Huan of Qin, who died in 577 BC, as ruler of Qin.