The origin of the name Adriel is Hebrew

And this is how Adriel is written in Hebrew

עַדְרִיאֵל

The meaning of the name Adriel is: flock of God

Adriel was the son of Barzillai, and the man to whom Saul gave his daughter Merab in marriage although she was already promised to David

The name Adriel appears in the bible in the following verses:

1 Samuel 18:19 KJV
But it came to pass at the time when Merab Saul’s daughter should have been given to David, that she was given unto Adriel the Meholathite to wife.

2 Samuel 21:8 KJV
But the king took the two sons of Rizpah the daughter of Aiah, whom she bare unto Saul, Armoni and Mephibosheth; and the five sons of Michal the daughter of Saul, whom she brought up for Adriel the son of Barzillai the Meholathite: