User name deemed inappropriate for inviting otheres, but allowed as user name??

[lunasidhe]

I am having issues when typing in my user name, to ask people to add me. It keeps saying inappropriate language and deletes the invite. Lunasidhe is not in any way inappropriate, its meaning is moon fairy. Please is there a way to allow it, or lacking that to change my nick to Avandrea so i can invite people to add my restraunt??

lunasidhe