Xi (/ʃiː/ shee;[1][2] Mandarin: [ɕi]) is the romanization in Pinyin of several different Chinese family names, including: Xi is spelled "Hsi" in Wade-Giles.
It is the 45th name in the Hundred Family Surnames poem written during the Song dynasty, around 1000 years ago.
It is the 133rd name in the Hundred Family Surnames poem.
During the Chu–Han Contention, many people surnamed Ji (籍) changed their surname to Xi (席) because of naming taboo of Xiang Yu, the Hegemon-King of Western Chu, whose given name was Ji (籍).
However it is not among the 400 most common surnames, occupying 0.01% of the Han population.