What organization do the protagonists create at the end of Assassin's Creed Origins?

The protagonists create the Hidden Ones at the end of Assassin's Creed Origins.

Bayek and Aya establish the Hidden Ones as a secret organization dedicated to protecting people from powerful rulers and oppressive forces. The group's formation provides the origin story for the Assassin Brotherhood that appears in later historical periods of the franchise.

Origins deliberately presents the Hidden Ones as an early predecessor rather than using the later name immediately. Its members adopt a hidden identity, operate from the shadows, and develop principles that later become associated with the Assassin Creed. The organization also uses the concealed blade, whose use is tied to a major early sacrifice.

The Hidden Ones should not be confused with the Order of Ancients, the rival organization they oppose in Origins. The Rooks are Jacob and Evie Frye's gang in Syndicate and belong to a much later era. Origins was released in 2017 and is set in Ptolemaic Egypt.