E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Oliver or Olivier.
Charlemagnes favourite paladin, who, with Roland, rode by his side. He was Count of Genes, and brother of the beautiful Aude. His sword was called Hauteclaire, and his horse Ferrant dEspagne.
A Rowland for an Oliver. Tit for tat, quid pro quo. Dr. J. N. Scott says that this proverb is modern, and owes its rise to the Cavaliers in the time of the Civil wars in England. These Cavaliers, by way of rebuff, gave the anti-monarchical party a General Monk for their Oliver Cromwell. As Monks Christian name was George, it is hard to believe that the doctor is correct. (See ROLAND.)