Renais

From Fire Emblem - Wiki on Neoseeker

The kingdom of Renais is ruled By King Fado. His children, Princess Eirika and Prince Ephraim were born there. After it was attacked by Grado, it was overrun by brigands. The turncoat Renais soldier Orson is appointed as the steward of the fallen kingdom by Grado until Eirika and Ephraim return. The Sacred Twins of Renais are the sword Sieglinde and lance Siegmund.