Baalberith

Balberith - An ex-prince of the order of cherubim.  Now in Hell, Balberith is a grand pontiff and master of ceremonies.  He is usually the one to countersign or notarize the signatures on the pacts entered into between mortals and the devil.  He is called "scriptor" and is so noted on documents executed in the underworld. In The Encyclopedia of Witchcraft and Demonology, Balberith appears to be the demon who possessed the body of Sister Madeleine at Aix-en-Provence, and who revealed to her the names of other devils. [Rf. Michaelis, Admirable History of the Possession and Conversion of a Penitent Woman; De Plancy, Dictionnaire Infernal (ed. 1863), where as Berith, he is pictured with a crown on his head and astride a horse.] (a)

Baalberith: According to Wierius, a demon of the second order; master of the Infernal Alliance.  He is said to be secretary and keeper of the archives of Hell.  (b)

Baalberith was the chief secretary of Hell, head of its public archives, and the demon who tempted men to blasphemy and murder.  When seated among the princes of Hell, he was usually seen as a pontiff.  He was also quite a voluble sort: according to the Admirable History written by Father Sebastien Michaelis in 1612, Baalberith once possessed a nun in Aix-en-Provence.  In the process of the exorcism, Baalberith volunteered not only his own name and the names of all the other demons possessing her, but the names of the saints who would be most effective in opposing them. (c) 

The Names of Some of the Good and Bad Spirits Solomon Made Use of which are mentioned in Enoch's Seven Tables, with a true account of their shapes, powers, government and effects, with their several seigniories* and degrees.

21 BERITH, a great and terrible Duke, he cometh forth as a red soldier on a red horse with a crown on his head.  He answereth truly of things past, present and to come.  He turneth metals into Gold giveth Dignities, and confirmeth them.  Speaketh with a clear and subtle voice.  26 Legions are under him.  (s)

*this is the spelling in the text

Read Balberith's entry in: Hell's Hierarchy as Described by Father Michaelis (1612)

Resource List - all entries are taken verbatim from the original source:

(a) "The Dictionary of Angels" by Gustav Davidson, © 1967

(b) "Encyclopaedia of Occultism" by Lewis Spence. ©1959

(c) "Fallen Angels...and Spirits of the Dark" by Robert Masello ©1994. 

(s) "A Treatise on Angel Magic, Being a Complete Transcription of Ms. Harley 6482 in the British Library."  Edited & Introduced by Adam McLean.  Phanes Press.  ©1990.  First published in 1949.