His full name is never given; he is always referred to by his title as the Lord of Arcy (i.e., Lord d'Arcy or Lord Darcy), even by his friends. He dresses in the style of an English aristocrat. He thinks of himself as English and yet Arcy seems to be a French place name. How he comes to be addressed as a "Lord" is never explained, though he seems deferential when dealing with other Peers such as Dukes, Counts, and a Marquis. In "Too Many Magicians" Darcy is said to be a cousin of the Marquis of London.