Nimue Celtic Knot Irish Watch. Ladies long rectangle silver-plated bracelet watch, 20x8mm (3/4" x 1/3") Celtic etched design on bracelet arms and matching etched design on black Mother of Pearl stone set dial. Japanese quartz movement. The Lady of the Lake (Dame del Lac) The Lady of the Lake was known by many names. She was most often Nimue (also Vivien). Nimue was the daughter of Diones and the lover of both Pelles and Merlin. As the Lady of the Lake, it was she who gave the sword Excalibur to Arthur and regained it when he died.