Saint Gwenhael (; ; Old Breton: Gwenhael) was a Breton saint of the 6th century, born at Ergué-Gabéric (Finistère), the second abbot of Landévennec Abbey, successor in 532 to the founder, Saint Winwaloe (Gwenole). According to tradition, Winwaloe met Gwenaël in a street in Quimper when he was eleven, and was so convinced of his gifts that he at once obtained permission from Gwenaël's parents for him to study under his direction. The feast of Saint Gwenaël is 3 November. His Vita was written in the 9th century.