Darius was the name of three kings of ancient Persia:

• Darius the Great or Darius I of Persia.
• Darius II of Persia
• Darius III of Persia

as well as several other kings:

• Darius of Media Atropatene
• Darius of Pontus

There is also a series of video games called Darius.

For information on the UK singer and former Pop Idol contestant Darius see Darius Danesh.