I just discovered a resource relating to Quakers in Ireland. I had no idea there had been Quakers living in Ireland from the 17th century onwards. You can find abstracts of Quaker wills in Ireland indexed from the Irish Manuscripts Commission's Quaker Records Dublin, Abstracts of Wills, edited by P. Beryl Eustace and Olive C. Goodbody, at this site:
Thanks to colleagues on the Fermanagh Gold list for this information.