The non-canonical map from the television adaptation Game of Thrones places the town south of the Blue Fork, while the semi-canonical A Song of Ice and Fire Campaign Guide states it is on the Green Fork. It may be that Wendish Town is under the dominion of House Darry as Raymun Darry reports on its status to the Iron Throne.
A Game of Thrones
Wendish Town is destroyed at the beginning of the War of the Five Kings by raiders from the westerlands. All of its inhabitants are killed. They sought refuge in their holdfast, but the raiders set fire to it and when the townsfolk attempted to flee, they were shot down with arrows. Ser Raymun Darry tells of the attack to the Hand of the King, Lord Eddard Stark, and Eddard sends Lord Beric Dondarrion to bring Ser Gregor Clegane to justice.