The most un-original name in China is Liu Bo. Over 1.30M people has that name! This is the equivalent of John Smith in English.
I do not know any Liu Bo myself. But I know a few Wang Yong(#6), Wang Jun(#5), Li Yong, Wang Wei(#9), Li Wei(#10), Li Jun.
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There are more creative people, such as 3 brothers called Wang Ai Guo, Wang Ai Min, Wai Ai Dang, meaning Love Country, Love People and Love (the) Party respectively. Unfortunately such creavitivy wer persecuted during Cultural Revolution, because one can also interpret the 3 brothers as Love Guo Min Dang, i.e., Love KMT.