Were Incas the children of the sun god?

It was about 1200 that the Incas made their appearance. According to chronicler Garcilaso de la Vega, son of an Inca princess and a Spanish knight and landowner, myth had it that the original Inca, Manco Capac, along with his sister/bride, was sent down by his father, the sun-god, to Lake Titicaca to bring all peoples under worship of the sun.

In the royal city of Cuzco, the Incas organized a priesthood for worship of the sun in a polished stone temple. The interior walls were embellished with pure gold and silver. Along with the priesthood, special convents were established, such as the reconstructed one at the sun temple of Pachácamac, just outside Lima. Virgins of outstanding beauty were trained from as young as eight years of age to be 'virgins of the sun.' Archaeological evidence indicates that the Incas also offered human sacrifices. They sacrificed children to the apus, or mountain gods. Some bodies of children have been found frozen on Andean peaks.

Hope this answers your question.