From Pandæmonium, capital of Hell in Paradise Lost, an epic poem by John Milton : Greek pan-, pan- + Late Latin daemonium, demon (from Greek daimonion, from daimn, lesser god, demon.)
Mark 5:13 And He gave them permission. Then the unclean spirits came out and entered the pigs, and the herd of about 2,000 rushed down the steep bank into the sea and drowned there. 14 The men who tended them ran off and reported it in the town and the countryside, and people went to see what had happened.