1) Scottish boy name 2) Ulster Cycle character 
In Irish mythology, Noíse or Noisiu (modern spelling: Naoise; Irish pronunciation: @) was the nephew of King Conchobar mac Nessa of Ulster, and a son of Usnech (or Uisliu), in the Ulster Cycle. When Deirdre (Derdriu) was born, Cathbad the druid prophesied that she would be beautiful, `a woman with twisted yellow tresses, green-irised eyes of gre....
In Irish mythology, Naoise was the husband of Deirdre. He was killed by his uncle Conchobar.
the husband of Deirdre and a nephew of Conchobar, by whom he was treacherously killed.