Duke Zhuang had three sons. The eldest, Shifu (世父), refused the throne, preferring to campaign against the Rong tribes who killed his grandfather,
Qin Zhong. Duke Zhuang died in 778 BC after a reign of 44 years and was succeeded by his second eldest son
Duke Xiang of Qin. Duke Zhuang's daughter, Mu Ying (缪嬴), entered a political marriage with
Rong leader King Feng (豐王) in 777 BC. ==Posthumous title==