There are Italian Outcasts
There are Spanish Outcasts
There are Libertonian Outcasts
etc etc..
It's up to the player, really.
Except if you want to play a nationalistic outcast, then where does your nationalism stand with? The italian, the spanish or the libertonian?
Of course we are all free to play whatever we want, my [LN] was called Casero, son of corsairs, Dieter used to have a KNF called John Miyagi, there was a BPA with a kusarian name. But still every house has its roots, and you could describe it easyly.
But, seems it's not that easy when it comes to Corsairs and Outcasts. The difference is simple, Houses are lawful and the nations in which they are based, let's say, are lawful too, OCs and sairs are unlawfuls and the nations they are based (play along with me here) are not.
I won't get more into the subject, basically because it exceeds my knowledges.