(That too was regarded as the land of the Rephaim, who used to live there, though the Ammonites called them Zamzummites.
It is observable here that Moses, speaking of the Edomites (Deu 2:8), calls them, "our brethren, the children of Esau." Though they had been unkind to Israel, in refusing them a peaceable passage through their country, yet he calls them brethren.
Commenting on Deuteronomy 2:8-23
That also was accounted a land of giants,.... Ammon was so reckoned as well as Moab, Deu 2:10. giants dwelt therein in old time; the Rephaim dwelt there, as they did also in Ashteroth Karnaim, Gen 14:5. and the Ammonites call them Zamzummims; they are thought to be the same with the Zuzims in Gen 14:5 who had their name, as Hillerus (c) thinks, from...
(That also was accounted a land of giants: giants dwelt therein in old time; and the Ammonites call them Zamzummims; (i) Who called themselves Rephaims: that is, preservers, or physicians to heal and reform vices: but were indeed Zamzummims, that is, wicked and abominable.