Topic summary
Incestuous
Extracted from the Wikipedia article Incest.
From the Middle Ages onward
Incestuous marriages were also seen in the royal houses of ancient Japan and Korea, Inca Peru, Ancient Hawaii, and, at times, Central Africa, Mexico, and Thailand. Like the kings of ancient Egypt, the Inca rulers married their sisters. Huayna Capac, for instance, was the son of Topa Inca Yupanqui and the Inca's sister and wife.