All Tales, in Time
An archfiend is a particularly powerful fiend, often a Demon Lord or a Devil Archduke or Archduchess, and usually a creature that rules over one of the fiendish planes or has a fiendish army at their disposal.
The archdevils are the rulers of the Nine Hells. They are also called the Lords of the Nine, the Archdukes of Hell, and the Lords of Hell. They each control one of the plane’s nine layers and are the most powerful and highest-ranking devils.
Bel, the Warlord
Dispater, the Iron Duke
Mammon, the Viscount
Lady Fierna and Archduke Belial
The Archduchess Glasya
Baalzebul, the Slug Archduke
Mephistopheles, Archduke of Cania
Asmodeus, King of the Nine Hells
Each abyssal lord is a demon that has a realm on one of the layers of The Abyss.
Baphomet, the Horned King
Dagon, Prince of the Depths
Demogorgon, Prince of Demons
Fraz-Urb’luu, the Prince of Deception
Graz’zt, the Dark Prince
Juiblex, the Faceless Lord
Malcanthet, Queen of Succubi
Orcus, Demon Prince of Undeath
Pazuzu, Dark Angel of the Four Winds
Yeenoghu, the Beast of Butchery
Zuggtmoy, the Demon Queen of Fungi