This sigil, or seal, comes from the Lesser Key of Solomon, also known as the Clavicula Salomonis Regis, or Lemegeton, a compilation of materials and writings from ancient sources making up a text book of magic or “grimoire.” Portions of this book can be traced back to the mid-16th to 17th centuries.
Ronove is a Marquis and Great Earl of Hell, commanding twenty legions of demons. He teaches art, rhetoric, languages, and gives good and loyal servants the favour of friends and foes.