What was the name of the Inca moon goddess?

The Inca moon goddess was Mama Quilla.

Mama Quilla, also written Mama Killa, means “Mother Moon” in Quechua. She was one of the principal beings in Inca religion and was commonly described as the sister and wife of Inti, the sun god. In several traditions, she was also connected with Viracocha and the mythical founders Manco Cápac and Mama Ocllo.

Her lunar role had practical importance. Inca priests used the Moon’s phases to organize ceremonies and coordinate the lunar calendar with the solar year. Mama Quilla was also associated with marriage, women’s menstrual cycles, and protection of women. A temple dedicated to her stood in Cusco and was served by priestesses; her ritual image was linked with silver, the metal symbolically associated with the Moon.

A common mix-up is Pachamama, who represented Earth, fertility, and agricultural abundance. Mama Cocha was associated with the sea and other waters, while Mama Huaco was a culture-heroine and legendary ancestral figure rather than the Moon goddess. In eclipse stories, the Incas feared that an animal was attacking Mama Quilla and made noise to drive it away.