According to the Bibliotheca, Illyrius was the youngest son of Cadmus and Harmonia who eventually ruled Illyria and became the eponymous ancestor of the whole Illyrian people. Illyrius was specifically born during an expedition against the Illyrians on the side of the Enchelii.
According to the Bibliotheca, Illyrius, Cadmus and Harmonia's youngest son, became ruler of Illyria and is considered the eponymous ancestor of all Illyrians. He was born during an expedition against the Illyrians on behalf of a group known as the Enchelii.