From FinnegansWiki
The Nera is the name of several rivers in Italy, Russia and Romania.
Nera is a warrior of Connacht in the Ulster Cycle of Irish mythology. One Samhain night he has a vision of the destruction of Cruachan by warriors of the sídhe. He follows them into the Cave of Cruachan and spends a year in the Otherworld, but returns the same night he left. http://en.wikipedia.org/wiki/Nera_%28mythology%29
