Colonel Dubhaltach Caoch Mac Coisdealbhaigh, Irish soldier and Rapparee, died on Sunday 3 March 1667.
His brother was the soldier and poet, Tomás Láidir Mac Coisdealbhaigh.
Returning to Ireland after the Restoration and disappointed by his failure to recover the family estates, he devoted the rest of his life to wreaking vengeance on the new Hiberno-Norman Dillon landlords.
Proclaimed a tory and a rebel in the summer of 1666, Mac Coisdealbhaigh "carried out a vendetta of raids and burnings against Viscount Dillon in the baronies of Costello and Gallen, in east Mayo, until he was shot dead by the soldiers of Captain Theobald Dillon in Coolcarney ... Bunnyconnellan, early in March 1667."
His head was hung from the St. James Gate in Dublin, today the home of Guinness.