Oilioll Olum is a figure from Irish mythology, known as a king of the Tuatha Dé Danann, a supernatural race in ancient Irish lore. He is often associated with wisdom and leadership, playing a significant role in various myths and legends that highlight the struggles and triumphs of his people. In some tales, Oilioll Olum is depicted as a skilled warrior and a wise ruler, often involved in conflicts with other factions, such as the Milesians. His legacy is intertwined with themes of power, heritage, and the mystical elements of Irish folklore, making him a notable character in the rich tapestry of Ireland's mythological history.