A sector in the Galactic Frontier held the Kazlin system. The sector's affiliation with the Galactic Republic was quite recent, just a few months, when a Hutt starship was attacked by the Nihil in that system in 232 BBY. Jedi Terec theorized that this new allegiance was why the Hutt vessel was present, despite the Republic's trade restrictions with the clans.
The Kazlin system's sector was initially featured in the 2021 comic, The High Republic 2. Within the Star Wars Legends timeline, the Kazlin system resided within the Suolriep sector.