Here's a far out there guess. If the orcs don't care about the commonlands, what about the Crushbone Orcs and Faydwer? When I look at that map I get the impression that the city looking thing in the bottom right is Felwithe, the city on the far left could be Kaladim, the woods in the center are Kelethin's tree city. The mountains at the bottom could be the Steamfonts, the lake is the only tricky part, but there was a water system in Crushbone, maybe it overflowed
