Agents
Lug
See also: Cú ChulainnCú Chulainn – Young Ulster hero and chief character of Táin bó Cuailnge and other tales of the Ulster Cycle; son of Súaltam or Lug and Deichtire (sister to Conchobor); husband of Emer (ingen Forgaill)
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Lacey, Brian, Lug’s forgotten Donegal kingdom: the archaeology, history and folklore of the Síl Lugdach of Cloghaneely, Dublin: Four Courts Press, 2012. 
abstract:
Using archaeology, history, place-names, mythology and folklore, this book examines one of the smallest territorial units in Ireland from the beginning of history c.600, and traces its development to c.1100. It argues that these people from a remote area of Donegal constituted a tiny kingdom that had an ongoing association with the pagan god Lug – Lugh Lámhfhada. The book demonstrates how their original devotion to Lug was transmuted through conversion to Christianity, reconstituted in aspects of the cult of St Colum Cille and of a probably invented local saint – Beaglaoch. From c.725, their territory and influence were expanding – eventually giving rise to the powerful O’Donnell and O’Doherty families of the later Middle Ages. This illustrated book makes the Donegal landscape itself speak in a revealing manner, and offers a unique insight into wider early medieval history and religious culture.
Ó Riain, Pádraig, “Traces of Lug in early Irish hagiographical tradition”, Zeitschrift für celtische Philologie 36 (1977): 138–156.