Хаттусили I
The language or dialect of Kussara is neither found nor described in either the Assyrian or Hittite texts, but from the evidence of Old Assyrian trade tablets, it is known that a palace and a karum (Assyrian trade station) existed in the city. The Kings of Kussara became the Kings of Kanesh in the Karum IB period of Kanesh. Hattusili I and Hattusili III mentioned the origins of the Kings of the land of Hatti as Hattusili I styled himself: "man of Kussara . . . Great King Tabarna, Hattusili the Great King, King of the land of Hatti." No other town or land was ever mentioned by a King of Hattusa as the origin of the Kings of Hattusa.