Dou Dou means "go round" (兜兜). It can also mean "pocket, bag, solicit, move round, canvass, take a responsibility, take upon oneself" (兜) (dou) and "pocket, bag, solicit, move round, canvass, take a responsibility, take upon oneself" (兜) (dou) separately.
Tang San, Soul Land Wiki
Duan Hunxiao, Soul Land Wiki
Da Mao, Soul Land Wiki
Soul Land II, Soul Land Wiki
Yu Muchen, Soul Land Wiki
Lin Yuhan, Soul Land Wiki
Lion Douluo, Soul Land Wiki
Phoenix, Soul Land Wiki
Poseidon, Soul Land Wiki