Mac Cuill’s name links him to the hazel, a tree of wisdom in Celtic lore. He represents poetic knowledge and arboreal sanctity. Poets invoke Mac Cuill to honor the wisdom of trees, the integration of nature into kingship, and the last stand of the old gods before human dominion.

Mac Cuill (“Son of the Hazel”) is one of the three joint kings, associated with Munster and the hazel tree—sacred for its wisdom (linked to the Salmon of Knowledge). Students should connect Mac Cuill to druidic knowledge, poetic inspiration, and the sanctity of trees. His rule ends with the Milesian arrival, marking the transition from divine to mortal sovereignty. Poets reference Mac Cuill to explore the hazel’s role in wisdom traditions or the end of the mythic age in elegiac or transitional poetry.