Deuteronomy 2:20

That also was accounted a land of giants ,.... Ammon was so reckoned as well as Moab, Deuteronomy 2:10 .

giants dwelt therein in old time ; the Rephaim dwelt there, as they did also in Ashteroth Karnaim, Genesis 14:5 .

and the Ammonites call them Zamzummims ; they are thought to be the same with the Zuzims in Genesis 14:5 who had their name, as Hillerus F3 Onomastic. Sacr. p. 158, 288, 289. thinks, from Mezuzah, a door post, from their tall stature, being as high as one; and for a like reason Saph the giant might have his name, 2 Samuel 21:18 . The word Zamzummims, according to him F4 Onomastic. Sacr. p. 161, 310, 428. , signifies contrivers of evil and terrible things; they were inventors of wickedness, crafty and subtle in forming wicked and mischievous designs, which struck terror into people, and made them formidable to them.