The Third Brother was a male Force-sensitive being who, at some point in their life, departed from the Jedi Order. This order was an organization of individuals who could use the Force, and were allied with the Galactic Republic. He later became a member of the Galactic Empire's Inquisitorius. The Inquisitorius was an organization active during the Imperial Era and was made up of former Jedi whose purpose was to kill those Jedi who survived Order 66, find children with Force abilities, and suppress political opposition. The historian Beaumont Kin later discovered the existence of this Inquisitor, and included the Third Brother in his book The Rise and Fall of the Galactic Empire as an example of the codenames used by Inquisitorius members. This book was published in 35 ABY.
The Third Brother was initially mentioned in "Darth Maul and Other Followers of the Dark Side," a booklet belonging to De Agostini's Star Wars Encyclopedia series, which initially came out on July 13, 2021.
- " Darth Maul and Other Followers of the Dark Side " — Star Wars Encyclopedia (First mentioned)
- Star Wars: The Rise and Fall of the Galactic Empire