Yeah, the SCA people at Pine Creek are more than a wee bit confused when a guy speaking with an odd accent* claims to be the King of Griffinvale, and they've never heard of that Kingdom (there used to be only 12 in the Knowne World, but there are more now). This is just a fun little "fish out of water, displaced by approximately 1000 years" side story that I dreamed up. I suddenly had an image and conversation pop into my mind in which my female Park Ranger finds this guy after he accidentally gets clocked by a stray baseball, and thinks he's temporarily out of his mind when he insists he really was born in the year 1009 and is the king of a place nobody has ever heard of.
*I'm taking creative liberties here, since the English spoken in the 11th century isn't much like ours. King Randall Harding and Ranger Sarah Jones wouldn't be able to understand each other if they were to really meet.