Semi-mythical British king, the son of Cadwallon, king of Gwynedd, North Wales, described by Geoffrey of Monmouth in his book Historia Regum Britanniae (History of the Kings of Britain).
Red stands for hardiness and valour. White signifies purity and innocence. Blue represents vigilance, perseverance, and justice. The latest star, representing Hawaii, was added in 1960. Effective date: 4 July 1960.