The fictional nb character Niamh Healy appears in 'The Kaiju Preservation Society' by John Scalzi. Niamh has a doctorate in astronomy and physics, has a short temper, witty comebacks, and is a badass when the situation calls for it. I looked up the name because I was VERY sure I was mispronouncing it in my head, but I didn't understand just how far off I was. The book never explicitly states how to pronounce it.
There is a video game called Azrael's Tear. In this game you go on a quest to find the holy grail. Niamh's ghost comes out of a well to ask you where Oisin is. She also gives you hints on which way to go.