Four - Not necessarily meaning that they were brothers, but that they were all of the race of the Giant, all Rephaim. The word “four” is omitted in the parallel passage, only the three last being mentioned in that chapter.
Related Commentaries of 2 Samuel 21:22
2 Samuel 21:22
22 These four were born to the giant in Gath, and fell by the hand of David, and by the hand of his servants.