Where does “Φαέθων” come from?

Φαέθων (Ancient Greek) comes from Ancient Greek φᾰέθων, from Ancient Greek φᾰέθω — I shine”, “I am radiant.

Ancestry of “Φαέθων”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	φᾰέθων	shining”, “radiant; radiant, shining
2	Ancient Greek	φᾰέθω	I shine”, “I am radiant