(Count). A Paladin, the beau-ideal of valour, generosity, and truth. The story says he was sent by Charlemagne into the East, where he conquered Aliarde, a great Moorish prince. On his return he found his young wife, who thought he was dead, betrothed to Celinos, another of Charlemagne's peers. The matter being set right, the king gave a grand banquet. Dirlos is D'Yrlos.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894