Azazel was a powerful demon who served Lucifer. Until Sin City, Azazel's name was not revealed and he was referred to by nicknames such as The Demon, The Yellow-Eyed Demon, or Yellow Eyes. Once he killed Mary Winchester...
The name ‘Azazel’ may be derived from ‘azaz’ and ‘el’ meaning ‘strong one of God.’
A modern version English Standard Version provides the footnote "16:8 The meaning of Azazel is uncertain; possibly the name of a place or a demon, traditionally a scapegoat; also verses 10, 26".
Azazel is a yellow-eyed demon, one of the Generals of Hell commanding the demon armies of Hell, and seemingly the only one still active by 2007. Azazel planned to bring his army of black-eyed demons forth from Hell to unleash upon the world in preparation for the Apocalypse.
Azazel was the first enemy in the series. He rallies a demon-horde to take control of the after-life.
A modern interpretation of Azazel as a Satanic, goatlike demon, from Collin de Plancy's Dictionnaire
The goat demon Azazel is an ancient figure that can be found within Hebrew mythology.
Azazel meaning: Your nr. 1 site for Biblical names discusses the original Hebrew, plus the words and names Azazel is related to, plus the occurences of this name in the Bible.
What is the meaning of Azazel?
2. The Jewish Liturgy. _I. The Meaning of the Word_. 1. The Passages to Be Considered