Ananiel, Anânêl (Aramaic: עננאל, Greek: Ανανθνά) was the 14th Watcher of the 20 leaders of the 200 fallen angels that are mentioned in an ancient work called the Book of Enoch. The name means "Rain of God" even though his name is often confused with Hananiel. Michael Knibb believes his name to be "cloud of god".
Ananiel in pop culture
Supernatural character Anna Milton is likely based on Ananiel. In the show, Anna and her garrison of angels were assigned on watch over humans on Earth for two thousand years. Eventually, Anna's desire for emotion of her own drove her to fall and become human, for which she is hunted as a fugitive for other angel characters. Anna is a love interest for one of the show's protagonists, Dean Winchester.
References
Ananiel Wikipedia(Text) CC BY-SA