Arabic name (إبليس) means - "the one that causes despair; satan, devil; prince of darkness". Muslim form of the Latin name Lucifer.
Iblis (Shaitan, Aduw) - in Islam Iblis is a the head of the other evil spirits. According to the Qur'an, Iblis was originally an angel, but refused bow to Adam saying: "I am - better than he: I am from fire, and him created from clay." As a result, Allah has cursed him for his disobedience to His will and identified him a place in hell.