Sonia Vorbarra Vorpatril was a Princess of Barrayar. Her father was Xav Vorbarra, her mother was a Betan woman from the Bureau for Interstellar Trade; she had a sister named Olivia Vorbarra Vorkosigan. She married a Vorpatril who was not in a Countship line and became the mother of Padma Xav Vorpatril. Sonia Vorpatril was killed in Yuri's Massacre.