“…a key which reveals to us on indisputable grounds of comparative analogy… the Indian phœnix, the emblem of cyclic and periodical time, the “man-lion” Singha, of whose representations the so-called “gnostic gems” are so full. Over the seven rays of the lion’s crown, and corresponding to their points, stand, in many cases, the seven vowels of the Greek alphabet AEHIOYW, testifying to the Seven Heavens. This is the Solar lion and the emblem of the Solar cycle, as Garuda is that of the great cycle, the “Maha-Kalpa” co-eternal with Vishnu, and also, of course, the emblem of the Sun, and Solar cycle. … As well remarked by C. W. King: — “Whatever the primary meaning (of the gem with the solar lion and vowels) it was probably imported in its present shape from India, that true fountain head of gnostic iconography.”
https://en.wikipedia.org/wiki/Seven_rays