Barzillai's son, to whom Saul gave Adriel his daughter Merab in marriage. Saul did this even though she had been promised to David (1 Samuel 18:19). Later, King David gave Adriel's five sons to the Gibeonites. The Gibeonites killed these sons as punishment against Saul's family (2 Samuel 21:1–9).
Adriel
From Tyndale Bible Dictionary, adapted by Mission Mutual. CC BY-SA 4.0.