Karthigesu Sivathamby (May 10, 1932 – July 6, 2011), born in Karaveddy, Jaffna, Sri Lanka, was an emeritus professor of University of Jaffna.
Sivathamby has written and published more than 70 books and monographs and presented and published 200 papers at international seminars and journals on Sri Lankan Tamil history and literature. He was awarded Thiru V. Kalyanasundaram Award by the government of Tamil Nadu in India in recognition of his services to Tamil language. Sivathamby is a visiting Professor of Tamil to Universities in India such as the University of Madras and the Jawaharlal Nehru University and Cambridge University in England and in Finland and Norway.
Sivathamby has been honored in recent world classic Tamil conference in Coimbatore, Tamil Nadu, India
He received his Ph.D. (Drama in Ancient Tamil Society) from the University of Birmingham in 1970.