1、 Take your surname, descendants of Kunwu in the Zhou Dynasty. According to the Records of the Surname of Yuanhe and the Genealogy of Susun, Wu Hui, the grandson of Emperor Zhuanxu, was the Emperor Ku Huozheng, who gave birth to Lu Zhong, who was Fan Kunwu throughout his life. To King Wu of the Zhou Dynasty, his descendants were Si Kou Fensheng, who was granted the title of Su, and later moved to Wen (the old city is in the southwest of Wen County, Henan Province today). Later generations took the place name as their surname and called it the Su surname.
2、 From a foreign nationality, the surname was changed to Chinese. For example, the Balue clan of the Xianbei nationality in the Northern Wei Dynasty, the Dangxiang clan of the Western Xia in the Northern Song Dynasty, the Jurchen clan of the Jin State, and the Ilali, Sujia, Suduli, and Suerjia clans of the Manchu Eight Banners in the Qing Dynasty all changed their surnames to Han Su.