Elcmar was tricked by the Dagda into leaving his home, allowing Aengus to claim it. He represents cuckolded authority and the cunning of divine trickery. Poets use Elcmar to symbolize the fragility of possession, the passage of sacred sites, and the triumph of cleverness over brute rule.

Elcmar is a Tuatha Dé Danann figure, husband of Boann and guardian of Brú na Bóinne. The Dagda tricks him by manipulating time so that Aengus is conceived while Elcmar is away for a day that feels like a year. Students should note Elcmar as the lawful but outmaneuvered guardian—a figure of cuckoldry and temporal distortion. His story highlights the Dagda’s cunning and the mythic manipulation of time. Poets reference Elcmar to explore themes of deception, sovereignty, and the fragility of control.