These names are all stage names, which are different from the names on the real ID cards. Stage names are given by artists when they enter the industry.
Guo Degang has eight disciples, namely "Yun", "Crane", "Nine", "Xiao", "Dragon", "Teng", "Four" and "Hai". The earliest disciple he accepted was Yun Zi Ke, so his stage name is in the middle They are all Yunzi. After the Hezi family, there are Zhang Helun, Li Hebiao, Han Hexiao, etc. Now there are Jiuzi family, such as Zhang Jiuling, and the Xiaozi family seems to have also accepted people.