Abner: Cousin of Saul
Source: Nav
1 Samuel 14:50, 51
His wife’s name was Ahinoam daughter of Ahimaaz. The name of the commander of his army was Abner, the son of Saul’s uncle Ner. / Saul’s father Kish and Abner’s father Ner were sons of Abiel.
1 Samuel 9:1
Now there was a Benjamite, a powerful man, whose name was Kish son of Abiel, the son of Zeror, the son of Becorath, the son of Aphiah of Benjamin.