King Zhaoxiang of Qin
Because King Zhaoxiang had not yet legally come of age (traditionally at the age of 20), his mother, who was now known as Queen Dowager Xuan, became the regent. She was supported by her brothers, Wei Ran and Mi Rong (羋戎), as well as two other sons, Prince Yi (公子悝) and Prince Fu (公子巿), the four of them collectively known as the "Four Nobles" (四貴).
Zhao Xing
After Zhao Yingqi assumed the Nanyue throne, he appointed Zhao Xing as Crown Prince instead of his eldest son Zhao Jiande, despite the custom of primogeniture. When Zhao Yingqi died, Zhao Xing succeeded his father as king, and his mother Jiushi became Queen Dowager.