Oscar (oscara = "deer/god friend") is a figure in the Fenian Cycle of Irish mythology. He is the son of Oisín (the son of the epic hero Fionn mac Cumhail) and Niamh, and the brother of Plor na mBan, his bride is called Malvina.
Historicity. The historical institution of the fian is known from references in early medieval Irish law tracts. A fian was made up of landless young men, often young aristocrats who had not yet come into their inheritance of land.