Relationships
His title as Prince of Demons is contested and somewhat misleading in that in the chaos of the Abyss there are no official titles and positions. He holds this title through sheer power and the fact no other demon has been able to prove themselves his superior and wrest the name from him. Demogorgon is also known as Lord of All That Swims in Darkness.
The hatred between Orcus and Demogorgon is legendary. He is also a dedicated foe of both Graz'zt and Fraz-Urb'luu. Some of his allies include the Succubus Queen Malcanthet; the currently imprisoned Shami-Amourae was his former consort. In Gary Gygax's Gord the Rogue series, he is the brother of another demon lord called "Mandrillagon." He is served by the minor demon lord Abraxas that controls the 17th layer (Death's Reward) and was allied with demon lord Ilsidahur who control the 90th layer, just near the Demogorgon's ream.
One of Demogorgon's spawn with Malcanthet is the monstrous Arendagrost. According to WG7 he has a son with a mortal woman, the cambion Drumorg.
Demogorgon and the ancient and powerful obyrith Dagon have a sort of alliance. Demogorgon often travels to the domain of the elder demon lord to speak to him and try to gain knowledge and secrets from him or seek his vast wisdom for counsel.
Read more about this topic: Demogorgon (Dungeons & Dragons)