There is an Irish tradition that names Murias as one of the four cities of the Tuatha dé Danaan(b), who came to Ireland a thousand years before the Celts.
The pre-Hellenic Greeks were known as the Danai and were, according to an Egyptian source, the descendants of Danaus. Furthermore, the Danai have been linked with the legendary Tuatha dé Danaan of Ireland as well as the Shardana of Sardinia.
(a) Atlantis, A New Concept. Pt.1, Atlantis May-June, 1974