|"Gaheris House" by Brenna Jones
Good guess! But no.
For those of you who don't know or are uncertain, Carrun Corgar is the ruins of a tower mentioned in Moonblood, apparently a former stronghold of goblin King Vahe's . . . and a place of certain significance to Sir Oeric, one of our fine knights.
Corgar is also the name of the goblin who led the attack on Gaheris House in my fifth novel, Dragonwitch. So there is a strong correlation between the two locations.
But the two are not the same. Gaheris House is located farther north, while Carrun Corgar is built (apparently) on the same spot in the Between where Oriana Palace stands in the Near World.
But in all likelihood, Vahe named the tower for Corgar . . . and why he would do that is probably not too hard to figure out! (Though you'll have to read Goblin Son to find out why . . . and I, sadly, won't be writing Goblin Son for a little while yet. Got to finish Untitled Book 8 first!)