Phenex

Pseudomonarchia daemonum – Johann Wier (1583) (quoted)

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.

Goetia – S. L. MacGregor Mathers (1904) (quoted)

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.