E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Olympia (in Orlando Furioso).
Countess of Holland, and wife of Bireno. Cymosco of Friza wanted to force her to marry his son Arbants, but Arbants was slain. This aroused the fury of Cymosco, who seized Bireno, and would have put him to death if Orlando had not slain Cymosco. Bireno having deserted Olympia, she was bound naked to a rock by pirates; but Orlando delivered her and took her to Ireland. Here King Oberto espoused her cause, slew Bireno, and married the young widow. (Bks. iv., v.)