What is the name of the Assassin training organization in Assassin's Creed Origins?

The Hidden Ones are the Assassin training organization formed in Assassin's Creed Origins.

Bayek and Aya establish the Hidden Ones after confronting the Order of the Ancients, a secret organization manipulating political power in Ptolemaic Egypt. The Hidden Ones provide a structured community for people who oppose tyranny and operate from the shadows. Their principles and methods become the foundation for the Assassin Brotherhood seen in later historical periods.

Origins is set centuries before the medieval events of the first Assassin's Creed. Consequently, the game does not present the organization under the familiar later name at the start of the story. The Hidden Ones are a precursor, and the series' fictional history later connects them to the development of the Assassins.

The Order of the Ancients is the opposing organization, not the answer. It is an early predecessor to the Templar Order. The Rooks are Jacob Frye's allied gang in Syndicate, while the Initiates is not the name of the Egyptian organization. Origins was released in 2017.