Greeks.
Perseus, son of Danaë. His father Zeus descended in a shower of golden rain.
Heracles, son of Zeus, who deceives the mother of Heracles by pretending to be Amphitryon, her absent husband.
Romans. Story of Romulus.
Celts. Sagas and romances of Arthur, Merlin, and Beowulf.
Indians. Saga of Rama, in Ramayana.
Mexicans. Uitzilopochtli, myth of his birth.
Kiches. Hun-Apu and Xbalanque in the Popol Vuh.
Peruvians. Ataguju, the creator, begets Guamansuri, who seduces a woman, who gives birth to two eggs. From these emerged Apocatequil and Piguerão. Apocatequil was prince of evil and the most respected hero of the Peruvians.
(See also Culture Myths for other examples.)