The New John Gill Exposition of the Entire Bible2 Samuel 21:21
And when he defied Israel…
The armies of Israel, as
Goliath had done some years ago, (1 Samuel 17:10) ;
Jonathan the son of Shimea the brother of David slew him;
of David is called Shammah, (1 Samuel 16:9) ; and Shimma, (1 Chronicles 2:13) ; this
son of his is another man from Jonadab his son, who was famous for his
subtlety as this was for his valour, (2 Samuel 13:3) . The Jews say F4 this
was Nathan the prophet, a son of Shammah.
F4 Hieron. Trad. Heb. fol. 76. D.