To add to Don's comment: The Fearons or O'Fearons are said by Woulfe in his book on Irish names to be a sept (branch) of the O'Neills. They were definitely Ulster Irish and Co Armagh has many of them. A large group were in Kilmore Parish in the 1700s, though probably a lot had been displaced in the plantation. In Kilmore Parish in the 1600's one finds records with the name spelled O'Fferon, but over the years it has had numerous variants including Fearon, Fearns, Fern, Ferns, Farren, Farran, Feron, Feran, Ferin, Farnes and others which the Rev. Patrick Woulfe in a book called "Irish Names and Surnames" says are all the same Irish name "...O'Feara'in, which is the name of a branch of the Cinel Eoghain of Ulster." The Eoghain are the "...race of Eoghan, son of Niall of the nine Hostages... of which the O'Neills were for many centuries the chief family"