Ruggiero or Rizieri of Risa (in Orlando Furioso), was brother of Marphisa, and son of Rogero and Galacella. He married Bradamant. Charlemagne's niece, but had no issue. Galacella being slain by Agolant and his sons, Rogero was nursed by a lioness. Rogero deserted from the Moorish army to the Christian Charles, and was baptised. His marriage with Bradamant and election to the crown of Bulgaria conclude the poem.
Rogero was brought up by Atlantes, a magician, who gave him a shield of such dazzling splendour that everyone quailed who set eyes on it. Rogero, thinking it unknightly to carry a charmed shield, threw it into a well.
“Who more courteous than Rogero?” —
Rogero (in Jerusalem Delivered), brother of Boemond, and son of Roberto Guiscardo, of the Norman race, was one of the band of adventurers in the crusading army. Slain by Tisaphernes. (Bk. xx.)
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894