Gamigin is a marquis of hell, and commands 130,000 lesser demons, or more. He has the power of necromancy, and can summons soul that drowned in the ocean, for sure-fire interrogation. He appears as a horse or a man. Image: karkemish00 on Deviant Art, CC-BY-NC-ND
The Goetic Circle of Black Evocations and Pacts, to summon Satan for a deal. The circle is formed from human skin, fastened by nails from a coffin of an executed criminal. A parricide’s skull, goat horns, a bat drowned in blood, and the head of a black cat who was fed human flesh must be placed around it. From The Book of Black Magic and Pacts, A.E. Waite, 1910. Source: Embassy of the Free Mind
Illustrations by Martin van Maële from the 1911 edition of the book Satanism and Witchcraft (La Sorcière) by Jules Michelet, first published in 1862. While widely inaccurate, the book was one of the first sympathetic portrayals of the history of witchcraft.
Baphomet is a goat headed demon (or deity depending who you ask) that embodies opposing binaries: they’re human and animal, male and female, good and evil. They’re the source of inspiration for the Devil card image in the Rider-Waite Tarot deck, and much Satanic imagery, and are a part of many occult and mystical traditions.⠀
Dagol, The Prince of Darkness. The name Dagol doesn’t appear in any other grimoires or demonology books that I could find. His ‘Prince of Darkness’ designation leads one to believe it could be another name for Satan himself, however the demon Belial also bears that title. Though the source is quite old, it isn’t as old as it purports to be and was likely created for resale as a rare book, not as a genuine grimoire. Compendium Of Demonology and Magic, 1775.