“You know, I never thought about it. As you can see my name doesn’t have anything to do with my talent. So was with my family. But here in Ponyville however… I can think of three things really.
First - your name sets your talent, so pretty much your parents are responsible for it. However, with me it’s not the case, so I don’t think it’s a good theory.
Second - name change. I never asked anypony if they always had the same name they whole life, I do however know some foals who recently got their cutie mark and it fit their names, with no time for change.
Third - when parents name their foal they have some sort of subconscious premonition what their foal’s talent will be and give them a name related to it. Taking the amount of magic in Equestria I wouldn’t be surpried if both it was true, and that some ponies would be able to concentrate or other things, completely isabling the premonition…"