Is Guan's ancestor Xian or Guan Zhong?

Guan Zhong is the ancestor of Guan. There are very few people whose first surname is Guan. Guan Shu rarely preceded Guan Zhong, but he was not the ancestor of Guan.

1. Guan Shu Xian, the third son of Zhou Wenwang Ji Chang and Taisi, the mother and brother of Zhou Wuwang Ji Fa [1], one of the three major supervisors in the early Zhou Dynasty, was the monarch of the Zhou Dynasty (now Zhengzhou, Henan Province). Guan Shu or Guan Shu is called Xi 'an because it is a sealed country.

2. Guan Zhong's ancestor is a descendant, and he is of the same ancestry as the Zhou royal family. Guan Zhong's father, Guan Zhuang, is a doctor of Qi.