Last name Haitang (海棠 
, 海堂 , Haitang 
) , globally, is quite a common family name. The last name Haitang is habitual in Eastern Asia, particularly China, where it is a rare surname. More frequently, Haitang is the forename as well as the last name.
Gu, Duan, Lian, Tang, Tong, Tian, Feng, Wang, Weng, Yang, Yuan, Zeng, Zhao, Zhou, Xiao, Chang, Cheng, Liang, Jiang, Huang, Zhang, Zheng, Dong, Chen, Song, Xie, Li, Hu, Ye, Yu, Xu, Shi, Sun, Pan, Ren, Lin, Zhong, Liu, Jin, Niu, Hou, Wei, Yan, You, Yin, Zhu, Qin, Qiu, Luo, and Xiang