Uirne, or Tuirn(e),[1] ("sharp-mouth") was the sister of Muirne and the aunt of Fionn mac Cumhail in the Fenian Cycle of Irish mythology.[2]
The daughter of the druid Tadg mac Nuadat, Uirne is married three times. First, she and Conall have a son named Dáire. Then, she is wed to Imcad, the son of the king of Dal n-Araide. The queen transforms a pregnant Uirne into a dog, and her offspring from that union, Bran and Sceólang, are born as dogs. Finally, she and her third husband, Lugaid Lága, have three human children: Eogan Ruad, Sciath Brecc, and Cael Croda.[3]
It has been argued by at least one scholar that Uirne is actually a variant of Muirne, and not a separate figure.[1]