The Yiwa were an Alwari clan that were part of the Qiemo Adrangar tribal faction on the planet Ansion. Their leader in 22 BBY was Highborn Mazong. The Yiwa, though a lesser clan of the Alwari was not an unimportant one. Its members were known for their quickness to take offense and for always being on the move.
During their Mission to Ansion, a team of four Jedi—Obi-Wan Kenobi, Anakin Skywalker, Luminara Unduli, and Barriss Offee—performed at a feast at a Yiwa camp. The Yiwa were impressed by their performances, and agreed to aid them in their mission to find and negotiate with the Borokii overclan, in a bid to prevent Ansion's secession from the Galactic Republic.