The Black Knight, The Knight of the Black Laund
Sir Percard was the first of four brothers who had
long time ... holden war against the knights of the Round Table
The other brothers, Pertolepe, Perimones, and Persant, all became knights of the Round Table, as no doubt Percard also would have, had he survived, for on learning of his death Arthur and many knights of the court called it "great pity".
Percard's shield and arms, of course, were entirely black. Although Ironside was called 'The Red Knight of the Red Launds', Percard and the other brothers do not seem to have been related to him in any way, nor involved in his siege of Castle Dangerous.