Airechtach ua Dunchadh Muirsce (???–730) was a king of Ui Fiachrach Muaidhe. Airechtach was a grandson of Dúnchad Muirisci. However, unlike his grandfather, he never became King of Connacht. External links http://www.ucc.ie/celt/published/T100005A/index.html 730 deaths Monarchs from County Mayo 8th-century Irish monarchs Year of birth unknown