Congrès celtique
In 1917, Edward Thomas John, a Welsh nationalist and Member of Parliament for Anglesey, attempted to revive the former Celtic Association under the new name of "The Celtic Congress", thus initiating the second wave of inter-Celtic relations. For O'Farrelly and indeed her closest friend Douglas Hyde, who also took an active interest, the Celtic Congress held much in common with the Gaelic League with which they had for so long been involved: its "raison-d’être" was to nurture and promote scholarship and culture (albeit 'Celtic' rather than Irish); the congress was in theory to be held annually (similar to the Oireachtas); and its leading members were now drawn from educationalist and linguistic circles rather than the more exclusive Dublin Castle circle with which it had been associated at the turn of the twentieth century. Mary Hayden, Osborn Bergin, Eoin Mac Néill and Robin Flower were among those also involved in the Irish wing of the Celtic Congress. When E.T. John died in early 1931, O'Farrelly took on a heavier administrative role within the Celtic Congress, and in the Breton Francois Jaffrennou-Taldir's words, "the Association was given a new life in 1935 [sic], thanks to Miss Agnes O'Farrelly".