The Holly King and the Oak King are two sacrificial Gods who, in the manner of such deities, are two aspects of the same being. The Holly King represents the waning year, and battles the Oak King at Midsummer (probably once at Bealtaine) for rulership. Likewise, the Oak King is the God of the waxing year, and battles with the Holly King at Yule (probably once at Samhain) for the same honor.
The Oak King
The Oak King, the Lord of the Greenwood and golden twin of the waxing year, rules from Midwinter to Midsummer. At Midwinter, he goes to battle with his twin, the Holly King, for the favor of the Goddess. He slays the Holly King, who goes to rest in Caer Arianrhod until they do battle again at Midsummer. The Oak King and Holly King are mortal enemies at Midsummer and Midwinter, but they are two sides of a whole. Neither could exist without the other.
The Oak King
Represents: Growth, Expansion
Gods: Jupiter (Roman god of light and sky)
Janus (Roman god of planting, marriage, birth, and other types of beginnings)
Dagda (Irish-Celtic god of the earth)
Frey (Norse fertility god)
Pan (Greek god of fertility, unbridled male sexuality and carnal desire)
Colors: Red, green, yellow, purple
Plant: Oak, mistletoe
Associated myths: Robin Hood, King Arthur, Gawain (when he meets the Green Knight), Jesus, Balder, Green Man