↑ The Dictionary of Classical Mythology by Pierre Grimal and A. R. Maxwell-Hyslop, ISBN 0-631-20102-5, 1996, page 230: "Illyrius (Ιλλυριός) The youngest son of Cadmus and Harmonia. He was born during their expedition against the Illyrians"
↑ The Dictionary of Classical Mythology by Pierre Grimal and A. R. Maxwell-Hyslop, ISBN 0-631-20102-5, 1996, page 83: "... Cadmus then ruled over the Illyrians and he had another son, named Illyrius. But later Cadmus and Harmonia were turned into serpents and..."
