Aatrox is the only champ with no location on Runeterra's map

I just thought it was kinda weird that as I went through the world map of Runeterra (Thoroughly at that) and had no location where he had any of his stories or his origin locale I was sure it would be Shurima since he was an Ascended but no. Then I checked Icathia and the void if he was maybe there cause of the war. I even checked Freljord to see if maybe his relationship with had him there but nope not a thing. Why is he not there and where would you place him if you could.