Or simply, if you are doing very well in the Dutch league, I would expect people to speak about you. It isn't a name for the sake of a name. I mean, there is a reason why Messi is a big name player, while, I dunno, Gary Medel isn't really. Surely, with the numbers we have available to play in midfield, it is clear that we need someone of quality to come and improve us and take us up another level, particularly in Europe. It is highly unlikely a player who can have that sort of effect on Manchester United isn't a known quantity.
There are exceptions to everything, of course, but I'd just like the midfielder we sign, if at all, to be very good. If he is, chances are he'd be known about.