His father was Pariyawatri, who maybe was not a king.
The first king of free Cilicia, Isputahsu was recorded as a "great king" in both cuneiform and Hittite hieroglyphs. A treaty between Ishputahshu and Telepinu is recorded in both Hittite and Akkadian.
- The Routledge Handbook of The People and Places of Ancient Western Asia by Trevor Bryce
- The Kingdom of the Hittites by Trevor Bryce
- Yakubovich 2010, pp. 273–4
- Hallo, William W. (1971). The Ancient Near East: A History. New York: Harcourt Brace Jovanovich. pp. 111–112.