The Mosa
It's been known in the old world that the Mosa (Eights) have been exploring the coastlines and some assumed they'd made it to the Americas, but there were no settlements or any other confirmation of this fact and most dismissed it as stories. The truth is that several Mosa have indeed rediscovered the Americas and the proof is in the children they have unknowingly left behind. The Valos are welcoming to strangers and a travel-weary Mosa is ready to accept such hospitality.
The most recent of these was a one-man expedition in Salim, who sailed across the Atlantic until he reached North America. There he encountered Vamic, and the two developed a relationship. Understanding why his predecessors kept quiet about America (the Twos of the old world are not highly thought of), Salim returned home to report his failure in reaching the new world. He did not realize he left behind a son in Ronan.