GEEKFORCE 1) Your name for e.g. Together, "GEEKFORCE" is it right now. That one doesn't need to be unique.
2) Trade Name is, as I think, the name people will see when you transfer money to them (and the name for statements, invoices, ..) .. for private users it's the "legal name"
3) This is the actual username, that one needs to be unique. In your case it's "GEEKFORCE-Cyan-Dragon" right now, with that you have a direct link to your profile: https://together.bunq.com/u/GEEKFORCE-Cyan-Dragon