From Chinese 习 (xí) referring to an ancient territory named Xi, which existed during the Zhou dynasty in the Qin state in what is now Shangxian County, Shaanxi province. A notable berarer is Xi Jinping (1953-), the current president of China.
From Chinese 奚 (xī), possibly a short form of various Xianbei compound surnames such as Boxi (薄奚) or Daxi (达奚), which were changed to Xi after Han assimilation.
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