I think if you named yourself after a yoyo you no longer like or did an impulse name that now sounds dumb to you, you could change your name and there would be a thing by your trade count that would say " Formerly known as" and list your past name or names.
I like the “previously known as” part, but I feel keeping the name changing power bestowed solely to the mods is a good thing. It keeps down the chaos an confusion 
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