Muirchertach mac Muiredaig (died c. 534), called
Mac Ercae,
Muirchertach Macc Ercae and
Muirchertach mac Ercae, was said to be a
High King of Ireland. The
Irish annals contain little reliable information on his life, and the surviving record shows signs of retrospective modification. The
Aided Muirchertaig Meic Erca takes as its theme the supernatural death of Muirchertach.