When you read about Manco Capac, you find out that he was an Incan politician (governor and founder of the Inca civilisation) - so maybe they were political figures?
No, this can't be becuase Mama Occlo is a Goddess of Fertily!.
So let's go back to Manco Capac, was he treated as a God? This is possible because many rulers were treated as gods. And yes, he was! He was believed to be the son of the Sun God.
So the correct answer is:
They were an Incan god and goddess.