You can't find it in ancient books before the Southern and Northern Dynasties. These were originally tribal names of ethnic minorities. Later, when they entered the Central Plains, tribal names became surnames.
The origin of minority surnames;
Ancient surnames were mainly Han surnames, and minority surnames were rarely used. In fact, minority surnames are an inseparable part of China surnames, which are closely related to Han surnames.
In fact, some ethnic groups are descendants of the Han nationality, and some have developed from long-term integration and intermarriage with the Han nationality. So, strictly speaking, these are not ethnic minorities.
Many departments take the department name as the surname, most of which are compound surnames, and there are also three-character surnames and four-character surnames. There are about 300 surnames, and after many ethnic amalgamations, they have basically become single surnames, which are merged with the surnames of the Han nationality.
Most of them are ethnic minorities living in remote areas. Because of the culture of the Han nationality, they are gradually learning or imitating the Han surname, introducing it and passing it on.