A double viol was a stringed musical instrument, consisting of two hollow resonating boxes separated by a shaft with tonal cords strung on it. It was the favored musical instrument of Tionne Solusar, who took her grandmother's double viol with her after fleeing Rindao.
- "Firestorm"—Star Wars Adventure Journal 15 (First identified as Double viol)
- Dark Apprentice (First appearance)
- I, Jedi
- Jedi Academy: Leviathan
- Young Jedi Knights: Heirs of the Force
- Young Jedi Knights: Crisis at Crystal Reef
- The Crystal"—Star Wars Gamer 5 "
- The New Jedi Order: Edge of Victory II: Rebirth (Indirect mention only)