The owner of TTX in Roblox appears to be John Roblox if you mean TDX / Tower Defense X ; that game is widely associated with him.

If you meant a different Roblox group or game named TTX , the name is a bit ambiguous, and the result can change depending on which one you mean. The only other “TTx” result I found was TTx Inc. , which is a separate real- world company and not Roblox-related.