Lưu or Luu is a Vietnamese surname. It is also the Vietnamese transliteration of the Chinese surname Liu (). during the Ancient, The Yao people use surname Liu (劉), H'mong-Mien Lìu, they emigrate from Guangdong, Guangxi, to Vietnam. during the Yuan dynasty, the Mongols used the surname Liu in Vietnam.

Leeds University Union (LUU) is the representative body for the students at the University of Leeds, England. It is led by a group of six student sabbatical officers known as the Student Executive, supported by volunteer students acting as Reps and a large body of staff, both full-time and part-time. The organisation's aim is the advancement of education of Leeds students, by representing, supporting and advising students to improve their welfare and promote their interests and through the provision of social activities.