Djahi, Djahy or Tjahi was the Egyptian designation for southern Retenu. It ran from approximately Ashkelon to Lebanon and inland as far as Galilee. It was the watershed of the Jordan river during the Eighteenth and Nineteenth dynasty of Egypt battles with Kadesh.
It was the scene of the Battle of Djahy between Rameses III and the Sea Peoples.
References
Djahy Wikipedia(Text) CC BY-SA