Who is Su Xun's grandfather?

Su Gao. In the Su Family Tree written by Su Xun, Su Xun's grandfather Su Gao was charitable, filial to his parents, friendly to his brothers and sincere to his friends. Su Xun's father Su Xu is also a kind and enthusiastic person. During the famine years, he often distributed food for free to help the victims. In the second year of Song Zhenzong Dazhong Xiangfu, namely 1009, Su Xun was born. At this time, Sujia has been breeding in Meishan for more than 300 years.