The Aargauuns were a group from the planet of Aargau. The female Jedi Knight Talia Moonseeker was Aargauun, and shortly before the outbreak of the Clone Wars in 22 BBY, Moonseeker reached the rank of Jedi Knight after training under Jedi Master Va'too. Four months after her promotion, Moonseeker fought in the First Battle of Geonosis, during which her former Master was killed, while the Aargauun survived; the outcome compelled Moonseeker to hang her head in shame.
In The Clone Wars: Wild Space by Karen Miller, Talia Moonseeker's species name was misspelled as "Argauun." Miller confirmed the mistake and that she was referencing the obscure people, not creating a new one.