Ardal aep Dahy was a Nilfgaardian nobleman and the leader of the East Army Group during the Northern Wars. Later, along with Joachim de Wett, Count d'Arvy, Berengar Leuvaarden, the Count of Broinne and Stefan Skellen, he conspired to remove Emhyr var Emreis from the imperial throne and put Morvran Voorhis in his place. He fought in the Battle of Brenna but, when the North won against Nilfgaard, he escaped in Aldersberg with his men, where he died after a food poisoning.