In Yuuzhan Vong religion, the Twin Gods were Yun-Yammka, the God of War, and Yun-Harla, the Goddess of Deception. Together, they promoted victory in battle over the enemies over the Yuuzhan Vong, and were held in great reverence by the Yuuzhan Vong. Only Yun-Yuuzhan surpassed them in official importance, though many privately held the Twin Gods in greater regard. They had a holiday known as the Festival of the Twin Gods.
During the Yuuzhan Vong War, the Solo twins came to be associated with the Twin Gods (Jacen due to his defeating of Warmaster Tsavong Lah, Jaina because she had declared herself an avatar of Yun-Harla). Twin Gods was also used to refer to Yun-Txiin and Yun-Q'aah, the Lover Gods.
- The New Jedi Order Sourcebook (First mentioned)