Kish was the father of Saul, and Ner the father of Abner was the son ¹  of Abiel.

¹ Now as Saul watched David going out to fight the Philistine, he asked Abner, the general in command of the army, “Whose son is this young man, Abner?” Abner replied, “As surely as you live, O king, I don’t know.”

David called to the army and to Abner son of Ner, “Won’t you answer, Abner?” Abner replied, “Who are you, that you have called to the king?”

The name of Saul’s wife was Ahinoam, the daughter of Ahimaaz. The name of the general in command of his army was Abner son of Ner, Saul’s uncle. ¹ 

So when David returned from striking down the Philistine, Abner took him and brought him before Saul. He still had the head of the Philistine in his hand.

The king sat down in his usual place by the wall, with Jonathan opposite him ¹  and Abner at his side. ²  But David’s place was vacant.

So David set out and went to the place where Saul was camped. David saw the place where Saul and Abner son of Ner, the general in command of his army, were sleeping. Now Saul was lying in the entrenchment, and the army was camped all around him.

So David and Abishai approached the army at night and found Saul lying asleep in the entrenchment with his spear stuck in the ground by his head. Abner and the army were lying all around him.

David said to Abner, “Aren’t you a man? After all, who is like you in Israel? Why then haven’t you protected your lord the king? One of the soldiers came to kill your lord the king.