Nguyễn Lữ (Hán tự: 阮侶; died 1787), also known by the title of Đông Định vương (東定王, "king of Eastern Conquering"), was the one of the Tây Sơn brothers who formed short-lived Tây Sơn dynasty of Vietnam.
Nguyễn Lữ (chữ Hán: 阮侶; auch Nguyễn Văn Lữ; * um 1754; † Ende 1787) war neben seinen Brüdern und Nguyễn Huệ einer der Anführer der . Ab Ende 1786 regierte er als Đông Định Vương über den südlichsten Teil des Tây-Sơn-Reiches. Er besaß jedoch weder die staatsmännischen noch die militärischen Fähigkeiten seiner beiden Brüder und wurde wenig später von Nguyễn Phúc Ánh besiegt. (de)
Nguyễn Lữ (Hán tự: 阮侶; died 1787), also known by the title of Đông Định vương (東定王, "king of Eastern Conquering"), was the one of the Tây Sơn brothers who formed short-lived Tây Sơn dynasty of Vietnam. (en)
응우옌르(Nguyễn Lữ), 작위는 동딘브엉(Đông Định vương),1754년 ~ 1787년)은 떠이선 왕조의 군주 응우옌냑의 남동생이다. (ko)