Muirenn

Either derived from Gaelic muir "sea" and fionn "fair, white", or else a variant of MUIRNE.

MUIRNE   female   Irish Mythology
Means "festive" in Irish Gaelic. In Irish legend this was the name of the mother of Fionn mac Cumhail.
EQUIVALENTS
IRISH MYTHOLOGY: Muirenn
IRISH: Muireann, Muirenn
SCOTTISH: Murron
OTHER FORMS
IRISH MYTHOLOGY: Muirne
IRISH: Morna, Murna, Myrna
SCOTTISH: Morna