A clan of those who hate stupidity, dullness, and cults that destroy the mind!

Hmm, whose is it then?

Cthulhu is a descendant of Leviathan, who is depicted in the Bible as a "serpent, twisting, a sea monster" (I believe it's in the book of the prophet Isaiah).
In Hell, Leviathan is considered the secretary for marine affairs, as Satan appointed him chief over all the waters.