Komentaryo sa Genesis 15:20: Rashi, Chizkuni, Radak & Siftei Chakhamim

ואת הרפאים AND THE REPHAIM — the land Og King of Bashan, of which it said, (Deuteronomy 3:13) “All that (Bashan) is called the land of the Rephaim”.

ואת הרפאים, another word for the tribe known as Chivvi, mentioned as one of the seven Canaanite tribes.

ואת החתי, the omission of the חוי may mean that that tribe was identical with the רפאים.