How did King Crimson get their name?

The band's name was coined by Sinfield, though it is not meant to be a synonym for Beelzebub, prince of demons. (According to Fripp, Beelzebub would be an anglicised form of the Arabic phrase "B'il Sabab", meaning "the man with an aim".) Historically and etymologically, a "crimson king" was any monarch during whose reign there was civil unrest and copious bloodshed; the album debuted at the height of worldwide opposition to the military involvement of the United States in Southeast Asia.