As I research Samuel Townley, born in 1833 in Co. Cavan (and emigrated to Canada in the early 1850s)... I search out any Townley reference in Ireland in that general time frame or earlier. I recently was looking at a copy of a Registry of Deeds, Abstact of Wills, Vol. 2. In it there is a summary of a will of a John Balfour from 1750. There is a reference there to apparently a beneficiary named Townley (oddly no first name is given) who is identified as the "eldest son of Blaney Townley, Piedmont, Co. Louth". Perhaps this may fit with the Blayney you are interested in.