Baatezu Nobles

Baatezu nobles stand somewhere between Pit+Fiends and the Lords of the Nine in the Baatezu hierarchy. They have been given their first taste of individuality by their patron lords as embodied by their unique forms and abilities. Serving as viceroys and advisors in the courts of the Lords of Baator, the nobles are an integral part of baatezu politics. They hold various titles such as baron(ess), count(ess), prince(ss), and duke/duchess, the meanings of which vary according to the Lord bestowing them. Although they serve the Lords, their primary goals are usually to improve their own station and eventually replace one of the Nine.

Examples:

Avernus: Amduscias and Malphas (servants of Tiamat); Amon,
Armaros, Azazel, Bist, Cahor, Caim, Dagon, Duskur, Herodias, Kochbiel, Malarea, Moloch, Nergal, Nisroch, and Rumjal (Outcast Dukes)

Dis: Lilis (Dispater's consort), Arioch the Iron Avenger, Biffant (Provost of the Iron City), and Titivilus (Nuncio of Dispater); Alocer, Bitru, and Merodach (commanders of Dis's armies)

Minauros: Bael, Caarcrinolaas, and Melchon (Mammon's generals); Focalor (Mammon's seneschal); Glwa (Mammon's new consort)

Phlegethos: Balan, Bathym, Gaziel; Chamo (Legate of Abriymoch)

Stygia: Agares and Machalas (Levistus' commanders)

MALBOGE: The nobles were all from Baalzebul's court but were
withdrawn after Moloch fell. No unique devils have achieved the rank of
noble when the Hag Countess ruled and only one has during Glasya's rule
(Tartach)

Maladomini: Baftis (First Consort), Lilith (Second Consort),
Neabaz (Herald of Lies), Barbatos (Marshal of Maladomini), and the
generals Abigor, Bileth, and Zepar.

Cania: Adonides (Steward of Cania), Baalphegor (lord's consort),
Barbas (Chamberlain of Mephistar), and Bele (Justiciar of Cania);
Bifrons and Hutijin command armies in Cania under the pit fiend
Nexroth's command

Nessus: Adramalech (Chancellor of Hell), Phongor (Inquisitor of Nessus), Selm (Prince of Possessors), Martinet (Constable of Asmodeus), and the commanders Buer, Bune, Morax, Rimmon, and Zagum.