Phenex

Phenex - an angel now serving in Hell who "hopes to return to the 7th throne after 1,200 years," as he confided to King Solomon. [Rf. Waite, The Lemegeton.]  In the nether regions Phenex is a great marquis, a poet, and commands 20 legions of spirits.  Spence, Encyclopaedia of Occultism, reports that Phenex was formerly of the order of thrones and that this "was proved after infinite research."  In Baruch III, 6, the phoenix is the bird that circles before the sun to receive the rays on its outspread wings so as to preserve living things from being consumed.  It is the same bird that awakens from slumber all the cocks on earth.  A parallel may be cited (in Indian lore) in the bird Gadura "who carried Aruna on its back and placed him in front of the sun where he acted as charioteer and screened the world from the sun's consuming rays."  (a)  ~apparently Phenex (Phoenix) is not the be confused with The Phoenixes who are angels of a high order according to Davidson.

Phoenix is a great marquesse, appearing like the bird Phoenix, having a childs voice: but before he standeth still before the conjuror, he singeth manie sweet notes. Then the exorcist with his companions must beware he give no eare to the melodie, but must by and by bid him put on humane shape; then will he speake marvellouslie of all woonderfull sciences. He is an excellent poet, and obedient, he hopeth to returne to the seventh throne after a thousand two hundreth yeares, and governeth twentie legions. (g)

PHENEX. - The Thirty-Seventh Spirit is Phenex (or Pheynix). He is a great Marquis, and appeareth like the Bird Phoenix, having the Voice of a Child. He singeth many sweet notes before the Exorcist, which he must not regard, but by-and-by he must bid him put on Human Shape. Then he will speak marvellously of all wonderful Sciences if required. He is a Poet, good and excellent. And he will be willing to perform thy requests. He hath hopes also to return to the Seventh Throne after 1,200 years more, as he said unto Solomon. He governeth 20 Legions of Spirits. And his Seal is this, which wear thou, etc. (h)

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

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

(g) Pseudomonarchia daemonum - Johann Wier (1583)

(h) The Lesser Key of Solomon.  GOETIA.  Compiled and Translated By S.L. "MacGregor" Mathers.  Editing and Additional Material By Aleister Crowley