Eleri of Gwytherin

Saint Eleri of Gwytherin was a Welsh saint of the 7th century, one of the sisters of Saint Beuno. She founded a monastic settlement at Gwytherin, whose church was dedicated to her until the 12th century. Her niece, Saint Winifred (Gwenffrewi), joined her in her old age and succeeded her as leader of the settlement.

Eleri is one of the saints often wrongly taken to be men, precisely because she was a leader. She is sometimes called Elerius, sometimes Theonia.