"Form of Phoenix"
The name Phenix is commonly a unisex name from the "Greek" origin.
Phenix is a respelling of Phoenix, the name of the mythological bird described in Greek sources. The two spellings differ only in the first vowel, written e here rather than o.
Phoenix means "A bird that built its own pyre and then was reborn from the ashes".
The pronunciation of Phenix is FEE-niks.