Chivas 1-2-3 changed its name to Sorcerer on the Rocks to prevent legal fight with which blended Scotch whisky that is part of Pernod Ricard?
Sorcerer on the Rocks:  The name was changed from Chivas 1-2-3 because ADV Films didn't want to get into a legal fight with the Whiskey company of the same name. Chivas Regal: Chivas Regal is a blended Scotch whisky produced by Chivas Brothers, which is part of Pernod Ricard.
Chivas Regal