Don't forget Carlson Gracie JJ. Essentially the only reason the words BJJ came about is because of the trademark and high cost of using the words GJJ.
Pardon me, I actually meant to say Carlson Gracie. Carlos Gracie co-founded Gracie Jiujitsu along with his younger brother Helio. I think the late Carlson was the son of Carlos if I'm not mistaken.