Yep!
I'm trying to remember if Grover did it after he bought Charvel from Wayne - I think that was the case. Grover was concerned that Jackson was too "extreme" for Charvel's customer base, so he created the brand, and then the headstock "migrated" to the other brand. I think... I'm getting older, and have had a few beers in my life, so I might be flipping that around...