ADRIEL was the name of one of
Saul's sons-in-law, mentioned in 1.
Sam 28,8 and 2.
Sam 21,8. SOme say, that his name translates "flock of God" or possibly "My flock is God" (= source of life). But it seems much more likely to be derived from the Aramaic word "eder", which is the equivalent of Hebrew "ezer" (help).
My first thought though was, that it might be one of those made up angel names. So if you want to know more about Adriel as an angel,check this:
http://www.angels365.com/angelinfo.asp?ID=413&Submit=View+Details
Andy ;—)