Nguyễn Văn Diệp, stage name Duy Khánh (1936 in Triệu Phước village Triệu Phong – 12 February 2003 in Fountain Valley) was a Vietnamese songwriter. He was one of the many singers and songwriters to settle in "Quận Cam" (Orange County) after the Fall of Saigon. He became famous in Vietnam in the 1960s, initially with the folk song genre and those composed by songwriter Phạm Duy. Later, he was considered one of the top 4 male singers of yellow music at that time - the other 3 were , , and Chế Linh. He was also known as a talented songwriter, who had written more than 30 songs.