I used to do this as well. My name is "unique" and hard to land on a single introduction. When people asked me for my name I would immediately start spelling it. Got some awkward looks. I used to lie and say my name was Mark (especially if it was for something temporary like a Taco Johns order or something) - Mark was easy to say and understand. However I don't recommend doing that. You should almost always use your real name. If for nothing else, the practice.