Shattiwaza or Šattiwaza, alternatively referred to as Kurtiwaza or Mattiwaza, was a king of the Hurrian kingdom of Mitanni in the fourteenth century BC. He is also referred to as Maduwatta" by Harvard's Professor Jorit Kelder. This reveals the Mittani are the Medes. Wikipedia on Medes etymology: "The original source for their name and homeland is a directly transmitted Old Iranian geographical name which is attested as the Old Persian "Māda-" (singular masculine). The meaning of this word is not precisely known. However, the linguist W. Skalmowski proposes a relation with the proto-Indo European word "med(h)-", meaning "central, suited in the middle", by referring to the Old Indic "madhya-" and Old Iranian "maidiia-" which both carry the same meaning. The Latin medium, Greek méso, Armenian mej, and English mid are similarly derived from it."
Shattiwaza was the son of king Tushratta. His Hurrian name was Kili-Tešup.
In the political turmoil following the death of his predecessor, the usurper Shuttarna III tried to murder Shattiwaza. Shattiwaza escaped and sought refuge by the Hittite king Suppiluliuma I. He married the daughter of Suppiluliuma and returned to Mitanni with a Hittite army. Shuttarna III, who had usurped the throne in his absence was defeated, and Shattiwaza installed as king of Mitanni. The events are recorded in the Treaty of Suppiluliuma and Shattiwaza (~1375–1350 BC).
- "Suppiluliuma (Hittite) – Shattiwaza (Mitanni) Treaty Excerpts". Zoroastrial Heritage. K. E. Eduljee. Retrieved 17 November 2015.