Abner in Wikipedia
In the Book of Samuel, Abner (Biblical Hebrew אבנר בן נר
meaning "father of [or is a] light"), is first cousin to Saul
and commander-in-chief of his army (1 Samuel 14:50, 20:25). He
is often referred to as the son of Ner. Biography
Abner is only referred to incidentally in Saul's history (1
Samuel 17:55, 26:5), and is not mentioned in the account of
the disastrous battle of Gilboa when Saul's power was crushed.
Seizing the youngest but only surviving of Saul's sons, Ish-
bosheth, Abner set him up as king over Israel at Mahanaim,
east of the Jordan. David, who was accepted as king by Judah
alone, was meanwhile reigning at Hebron, and for some time war
was carried on between the two parties...