NewBrains [sic]? Brainwork? Brainworkers?
You could always have an off-the shelf, ready made company and use "[its name] trading as [whatever you like]" That's less restrictive but still subject to the rule that whatever you trade as must not be likely to be confused with an existing business. Since the Registration of Business Names Act is now long gone, finding existing trading names which might be confused with your choice is not as easy as it was, but a bit of common sense and general knowledge should suffice.