PrengalliCanonLegendsInfinities Prengalli were first mentioned in Star Wars: Aliens of the Galaxy, a reference book written by Jason Fry and released on August 23, 2016. Behind the scenes Prengalli were first mentioned in Star Wars: Aliens of the Galaxy, a reference book written by Jason Fry and released on August 23, 2016. Sources Star Wars: Aliens of the GalaxyAppearances