Mererid

Mererid is a Welsh feminine name derived from the Latin word margarita, meaning pearl, which itself traces back to Greek margaritēs. It is the Welsh equivalent of the widespread European name Margaret, sharing its root with forms such as Marguerite, Margarethe, and Mairead. The name has deep roots in Welsh literary and cultural tradition, appearing in medieval Welsh poetry and associated with the legend of the sunken kingdom of Cantre'r Gwaelod, where Mererid was the keeper of a sacred well.