The name Azarel is surprisingly popular in the Bible. There are five men mentioned with the name Azarel, and that’s not counting the three men named Azriel, which is a very similar name, or the name Adriel, which is the Aramaic version.

The Azarels of the Bible are:

A soldier listed among David’s mighty men (1Chronicles 12, 6);
A son of Heman and musician to David (1Chronicles 25, 18) who appears to be called Aziel in Chronicles 15, 20 and Uzziel in 28, 3.
A son of Jeroham and leader of the tribe of Dan in Israel (1Chronicles 27, 22).
A son of Bani who divorced his foreign wife during Ezra’s purge (Ezra 10, 41).
A son of Ahzai mentioned among the kohanim instituted after returning from Babylon (Nehemiah 11, 13 and 12, 36).