Here are a few demonic sigils.
From left to right:
1-He knows and teaches the virtues of the stars and the mansions of the planets, he also gives dignities, prelacies, and the favour of friends and foes, and can metamorphose a man into any shape.
2-The Count of Hell
3-Lord of the Flies and 2nd in command.
4-The ruler of the armies of hell
5-Demon of Lust
EDIT: This is for the followers that have been asking us to post stuff like this