Barbiel

Barbiel - once a prince of the order of virtues and of the order of archangels.  He is the angel of the month of October and one of the 28 angels of the 28 mansions of the moon.  In Barrett, The Magus, Barbiel is equated with Barakiel (which would make Barbiel ruler also of the month of February).  In the underworld, Barbiel serves as one of the 7 Electors, under the suzerainty of Zaphiel. (a)

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