Evnissyen and Gwern’s uncle-nephew relationship

Evnissyen and Gwern’s relationship is defined by the gulf between kinship and action: Evnissyen presents himself as a loving maternal uncle, then kills his young nephew during a feast meant to secure peace. Gwern’s death shatters the settlement and becomes the immediate turning point from reconciliation to renewed war.

Kinship and the Peace Settlement

Gwern is the son of Branwen and the Irish king, making Evnissyen his maternal uncle. Their encounter takes place after the Irish and the men of the Island of the Mighty have agreed to peace. The settlement includes a vast, fortified house, and Gwern has been welcomed by the assembled company; sovereignty has been conferred upon him. His place among both sides gives the reunion the appearance of a family gathering as well as a political reconciliation.

When Gwern passes from Bendigeid Fran to Manawyddan, Evnissyen calls attention to the boy’s failure to come to him. He presents himself as eager to fondle his sister’s son, adding that he would welcome the child even if Gwern were not king of Ireland. The appeal makes the uncle-nephew bond sound independent of rank and political advantage. Bendigeid Fran allows Gwern to go to him, and the boy approaches willingly.

A Gesture of Welcome Turned to Betrayal

Evnissyen’s apparent tenderness is a calculated deception. As Gwern comes within reach, Evnissyen privately resolves to commit an act unknown to the household, then kills the boy by thrusting him into the fire. The sequence gives the relationship its defining contradiction: Gwern’s trust and the family’s welcome are turned against him by the very uncle who has invoked their bond.

Branwen sees her son in the fire and tries to throw herself in after him. Bendigeid Fran restrains her, while the company rushes to arm itself. The peace feast collapses into tumult, and the relationship between uncle and nephew becomes inseparable from the wider conflict: Evnissyen’s betrayal destroys the fragile trust on which the settlement depended.

Consequences and the Final Reversal

The killing leads directly into renewed fighting. The Irish use the cauldron of rebirth to return their dead to battle, while the men of the Island of the Mighty do not receive the same recovery. Seeing the consequences and recognizing that he has brought his own side into severe danger, Evnissyen seeks a way to undo some of the damage. He throws himself among the Irish dead and breaks the cauldron from within, dying in the act.

That final sacrifice does not erase what he did to Gwern or restore the peace. It instead completes the relationship’s tragic pattern: Evnissyen first exploits the trust owed to an uncle to destroy his nephew, then gives his life in an attempt to limit the catastrophe his own action has unleashed. Gwern’s death is thus both a family betrayal and the point at which a political settlement gives way to devastating war.