- Phaethon - (Greek mythology) son of Helios; killed when trying to drive his father's chariot and came too close to earth
--1 is a kind of Greek deity
- Phaethon, genus Phaethon - type genus of the Phaethontidae
--2 is a kind of bird genus
--2 is a member of Phaethontidae, family Phaethontidae
--2 has members: tropic bird, tropicbird, boatswain bird - Phaethon, genus Phaethon - type genus of the Phaethontidae