You can change it client-side by using Cheat Engine, although you would have to do it every time you logged in and only you would see it.
Resources:
- Google "Cheat Engine"
I don't think that was the answer you wanted, but if the name is only bugging your eyes then you may relieve them with this.
P.S.
You can set up an automation *.exe file that will auto edit the location of your name to what you want it to be.
P.S.S.
Your new name must have the same amount of content as your old name.
For example, Tedd -> T3d will not work, whereas Tedd -> t3d1 will.






