Liú (留) s a Chinese surname. It is not among the 400 most common surnames in China according to the 2013 Fuxi Culture Research Association study.
Notable people
Liu Zan (留贊, 183–255), courtesy name Zhengming, a military general of the state of Eastern Wu during the Three Kingdoms period of China
Liu Congxiao (Chinese: 留從效, 906-962), formally the Prince of Jinjiang, was a general of the Chinese Five Dynasties and Ten Kingdoms Period state Min
Liu Shaozi (留紹鎡) was a nephew of Liu Congxiao, a warlord late in the Chinese Five Dynasties and Ten Kingdoms Period