Levkosia, the Capital of Cyprus, originally titled Levkosia, die Hauptstadt von Cypern is a book written by the young Archduke of Austria and first published around 1881.

Source: https://cyprus-mail.com/2023/01/06/greek-publication-of-levkosia-the-capital-of-cyprus/

She was presented to Rosaria as a political hostage, but the Archduke of Rosaria never looked at his ward this way.

Source: https://gamerant.com/ff16-xvi-final-fantasy-16-jill-die-ending-explained/

You’re soon introduced to the character you play as: Clive Rosfield, eldest son (but not the anointed heir) of Archduke Rosfield, of the Grand Duchy of Rosaria.

Source: https://metro.co.uk/2023/05/22/final-fantasy-16-preview-goodbye-to-turn-based-fantasy-18823871/