Then everything points that it was atleast consciously done, in the sense that they wanted to take that name from you, have it for themselves.
So whether the motivation was to actually screw with you or simply because they want to emulate you is probably out in the open until you find out who it is, which might be unlikely.
You'll be better off giving the name a light alteration or adding an unique type of letter to it (or a ') at the end. Chances that you'll get that specific name back are slim to none unless you contact FFXIV support directly, and even then you might not get it back.
So whether the motivation was to actually screw with you or simply because they want to emulate you is probably out in the open until you find out who it is, which might be unlikely.
You'll be better off giving the name a light alteration or adding an unique type of letter to it (or a ') at the end. Chances that you'll get that specific name back are slim to none unless you contact FFXIV support directly, and even then you might not get it back.