Dragon Magazine #28 says Astaroth was an Arch Devil/Baatezu, Treasurer of Hell. Powers and Pantheons indicates he was an abyssal demon/Tanar’ri lord. Confused? Don't be. There are TWO Astaroths, one an archdevil and one a demon lord, and always have been ('twas in the turnover Realms packages I sent to TSR).
Many mortals have been slain down the years when their summonings brought "the wrong one," who arrived unconstrained!#Realmslore— Ed Greenwood (@TheEdVerse) November 7, 2020
Ah! Tricksy!! Yes. ;} TSR removed most of the "two entities with the same name" instances in the Realms (1 big survivor: Torm the thief, of the Knights, and Torm the deity; the former was named for the latter, as often happens in the Realms) to Dispel Confusion. I had a lot of them = realism.
— Ed Greenwood (@TheEdVerse) November 7, 2020