Derek Llewellyn-Jones

John Derek Llewellyn-Jones (29 April 1923 – 28 November 1997) was an Australian gynaecologist and author. He was an associate professor of Obstetrics and Gynaecology at the University of Sydney for 23 years. He wrote Everywoman, the textbook Fundamentals of Obstetrics and Gynaecology, Everyman and Everygirl.

He was appointed an Officer of the Order of the British Empire (OBE) in the 1964 Birthday Honours.