@caleb-e-king You can’t change your mentioning name, but you can change the name above your mentioning name. For example, my mentioning name is @h-jones, but as you can see, my username is Heather. To do that, you go to Edit My Profile<Name (required), and you change the field under that.
I hope that is helpful and/or makes sense! I’m bad at explaining, so if you need clarification, I’ll try my best to do so. (:
Married a blacksmith, and now frequently uses his knowledge for writing fantasy.