Halavortigas used to be a city situated on the planet named Froz. This was before Naomi Dargon, the Moff governing the Corellian sector, commanded its destruction because it aided the Rebel Alliance throughout the Galactic Civil War.
The city of Halavortigas is referenced within Suns of Fortune. This sourcebook, released in 2014 by Fantasy Flight Games, was designed to supplement the Star Wars: Edge of the Empire module for Star Wars Roleplaying.