Phaethon is the only genus of the family Phaethontidae, Tropicbird Phaethontidae.

1/ Red-billed tropicbird (Chim nhiệt đới, Phaethon aethereus)

The scientific name Phaethontiformes comes from the Ancient Greek word Φαέθων (Phaethon), meaning "sun". The order's name is derived from the genus name Phaethon, which refers to the tropicbirds, so the full meaning connects to the "sun".