Easton's Bible Dictionary Flock of God, the son of Barzillai, the Meholathite, to whom Saul gave in marriage his daughter Merab (1 Samuel 18:19). The five sons that sprang from this union were put to death by the Gibeonites (2 Samuel 21:8, 9. Here it is said that Michal "brought up" [R.V., "bare"] these five sons, either that she treated them as if she had been their own mother, or that for "Michal" we should read "Merab, " as in 1 Samuel 18:19). Int. Standard Bible Encyclopedia ADRIEL a'-dri-el (`adhri'el, "my help is God"): The son of Barzillai the Meholathite, to whom Merab the daughter of King Saul was married when she should have been given to David (1 Samuel 18:19 2 Samuel 21:8). "Michal" in 2 Samuel 21:8 is a textual error easily accounted for Adriel and Merab had five sons, whom David handed over to the blood vengeance of the men of Gibeon. The name Adriel seems to be Aramaic, the equivalent of the Hebrew name Azriel.

Multi-Version Concordance Adriel (2 Occurrences) 1 Samuel 18:19 But it happened at the time when Merab, Saul's daughter, should have been given to David, that she was given to Adriel the Meholathite as wife. (WEB KJV JPS ASV BBE DBY WBS YLT NAS NIV) 2 Samuel 21:8 But the king took the two sons of Rizpah the daughter of Aiah, whom she bore to Saul, Armoni and Mephibosheth; and the five sons of Michal the daughter of Saul, whom she bore to Adriel the son of Barzillai the Meholathite. (WEB KJV JPS ASV BBE DBY WBS YLT NAS NIV)