 The earliest record of a Mac Suibhne, in relation to the clan, is of Murchadh Mac Suibne in 1267.Murchadh's father was Máel Muire an Sparáin of Castle Sween in Knapdale, who was himself the son of Suibne.Murchadh became a prisoner of Domnall Ó Conchobair and was handed over to the Earl of Ulster, in whose prison Murchadh is said to have died.