1) Vorkosigan Saga 
Vorbarra is a surname in the science fiction series the Vorkosigan Saga. It is the surname of the Emperors of Barrayar and the namesake of the planet. The emperors of Barrayar have all carried the name Vorbarra. As of the last book in series time, the current Emperor was Emperor Gregor Vorbarra, son of the deceased Crown Prince Serg Vorbarra, and ...