Unidentified planet (Nes Ukul)

The Jedi padawan Nes Ukul died on a planet whose name he did not know, defending a species whose language he could not speak. Nes Ukul's master later called the sacrifice noble. The antiques dealer Antron Bach remembered the story of Ukul's sacrifice on the planet while trying to decide if he should potentially sacrifice himself so that the Corellian Resistance member Miru Nadrinakar could escape from the Galactic Empire.

Behind the scenes
The planet was first mentioned, but not named, in "The End of History" a short story written by Alexander Freed and published in Star Wars Insider 154.