Behind the scenes
The Grehollo sector was mentioned in "Twinkle, Twinkle Little Star, How I Wonder Where We Are," a 1990 roleplaying game source article written by Glen Allison as a supplement for West End Games' Star Wars: The Roleplaying Game and published in Voyages SF 13. The article placed the Begali, Columus, Grehollo, Jedd, Jerijador, Kaelta, Nosken, and Tsukkia (spelled as the "Tsuk" system in the article) systems in the Grehollo sector.
Since the article was released outside of the Lucas Licensing process, its canonicity within the Star Wars Legends continuity was never confirmed, and the StarWars.com Online Companion to the 2009 reference book The Essential Atlas has since instead placed the Grehollo, Jerijador, Kaelta, Nosken, and Tsukkia systems in other sectors. Furthermore, since the Online Companion has also placed the Begali, Columus, and Jedd systems each in a different galactic region, this article assumes the Voyages SF 13 placement is no longer applicable to any of the star systems listed here.
- "Twinkle, Twinkle Little Star, How I Wonder Where We Are"—Voyages SF 13 (First mentioned)