Local Irish legend has it that Úna Bhán, the daughter of a McDermott chief, once fell in love with a boy who wasn't deemed worthy of her namesake. She was thus prohibited from leaving Castle Island, in order to let the romance wither.
Nonetheless, the infatuated boy began swimming across the lake of Lough Key to reach his love — and drowned. The tale concludes with Úna Bhán dying of grief, and the young lovers buried together beneath two intertwined oak trees on the island.
Facebook/Lough Key. Boyle