NET
51 Kish was the father of Saul, and Ner the father of Abner was the son of Abiel.
Darby
51 And Kish the father of Saul, and Ner the father of Abner were sons of Abiel.
KJV
51 And Kish [was] the father of Saul; and Ner the father of Abner [was] the son of Abiel.