Muriel f
English: of Celtic origin; see MUIREALL (SEE Muireall). Forms of the name are found in Breton as well as in Scottish and Irish Gaelic, and in the Middle Ages it was in use even in the heart of England, having been introduced from various sources; the surname Merrill is derived from it. See also MERIEL (SEE Meriel).
First names dictionary. 2012.