Mama Quilla (Quechua: Mama Killa), in Inca mythology and religion, was the third power and goddess of the moon. She was the sister and wife of Inti, daughter of Viracocha and mother of Manco Capac and Mama Ocllo, mythical founders of the Inca empire and culture. She was the goddess of marriage and the menstrual cycle, and considered a protector of women. She was also important for the Inca calendar.