Board Thread:Questions and Answers/@comment-24001319-20140527175236/@comment-241978-20140527235458

That depends on Revonnahgander customs, of which we know little. We're given the impression Rayona is Rook Blonko's girlfriend, but she could just as easily be in an arranged marriage with him.

Revonnahganders refer to strangers and acquiantances by their family names, and family and friends by their given names. Rayona refers to Rook Blonko by his family name, indicating formality. "Rayona" is probably her family name.

Ben refers to Rook Blonko by his family name because Ben was ignorant of Revonnahgander naming conventions and continues to do so out of habit.