Alright, back to the writing mines ^^ 
-I move them to the western Border, in the corner of the map, with their Stronghold being in the mountains there. 
-Oh, my bad, it should mean "Firstborn of Ragnar, who was the (second) son of Murin. (Leth would be Murins grandson)   
-Spider stuff is dropped! And no, i am not upset at all, but still would take the edge in underground exploration! 

For the whole "second son" business, dogematix and i had the idea that Ragnar (Leth´s father) and Agrim were twins, but nobody knows who was the first to be born. So both claim to be the older child! With Ragnar death, this would be a prime source for conflict! 

And thanks for the quick Feedback, its always welcome!