X
Although It is really challenging for western people to correctly pronounce X in Chinese pinyin, it appears a lot in Chinese Family names as the starting consonant letter. These family names are: Xia, Xie, Xi, Xiao, Xin, Xing, Xu, Xue, some of them even have two or more homophones.
Zh
Letter Combination of Zh appears in the Chinese family names of Zhao, Zhang, Zheng, Zhong, Zhu, Zhuo. It is another difficult pronunciation while popular consonant combination.
