Baron Von Ed said:
It's Ulnar IV in the Core rules. So I assume he's the father of the King in Flight from the Dark.
I think Ulnar IV IS the king in FftD. The gazetteer section of the core rules for LW suffers in this regard because the game was initially to be set in 5050, and when they made the decision to set the campaign in MS 5000, they forgot to change the names of the rulers. That's why most of the rulers in the gazetteer are the same as the ones Lone Wolf meets in the gamebooks.