Xav Vorbarra was a Prince of Barrayar and a cadet member of House Vorbarra. He was the son of Dorca Vorbarra, the half-brother of Yuri Vorbarra, as well as the brother of the wife of Ezar Vorbarra. In his youth, he served as ambassador to Beta Colony, and married a Betan woman. During the First Cetagandan War, he smuggled galactic weapons to the resistance.