Y Ladi Wen (English: The White Lady) or Y Ddynes Mewn Gwyn (English: The Woman in White), is an apparition of Welsh mythology, dressed in white, and is most commonly seen at Hollantide and the festival of Calan Gaeaf. Known in Welsh oral tradition, she is evoked to warn children about bad behaviour.[1] Y Ladi Wen is characterized in various ways including being a terrifying ghost who may ask for help if you speak to her, or she may offer treasure or gold.[2]
Y Ladi Wen is commonly connected with the villages of Ogmore, Ewenny (where she gives her name to White Lady's Meadow and White Lady's Lane) and St Athan.[3]