How do I make a unique Roblox name?

Take an ordinary word and change letters with other letters, numbers, or maybe and underscore. Make it your own and try to make it something that looks like it is not referenced off of a well-known person, or people will think you got it from him/her. Things that you like will be nice, for example if you like pie it could be Pie_Lover, or PiesAreKool. Just remember to make it something you will keep for a while, because if you want to change it, it costs 1,000 robux. And nothing like Marcy13853, instead it could be Mxrcy, Marxy, or Marcxy!