Darius I of Persia

Darius I (550 BCE - October 486 BCE), also known as Darius the Great, was the third king of the  and the eldest of five brothers.

Darius was strongly supported by the Templars, and they aided him when he overthrew the Empire's usurper Gaumata and ascended the throne of Persia.

Reference

 * Assassin's Creed Encyclopedia