Which Irish heroic cycles inspired writers during the Gaelic Revival?

During the Gaelic Revival, writers and intellectuals were primarily inspired by the heroic tales found in the Ulster cycle and the Fenian cycle.1

These cycles, which were made accessible through the translation of ancient Irish manuscripts, captured the imagination of the educated classes and helped fuel a resurgence of interest in Ireland's literary heritage. The Ulster cycle, which centers on the heroic age of the Ulaids and figures such as Cú Chulainn, was particularly influential; for instance, the tragic story of Deirdre and Noísi was retold in dramatic form by writers like William Butler Yeats and John Millington Synge. Similarly, the Fenian cycle, which focuses on the legendary hero Finn MacCumhaill and his band of warriors, provided a rich source of folklore and imagery that helped shape the nationalistic pride of the era.123