In the book "Les petits enfants du siècle" by Christiane Rochefort, Nicolas is Josyane's favorite brother. He's the only one Josyane (the lead character) truly loves.
This is the name of one of my friends, although he uses Nic as a nickname. I actually prefer this name, instead of Nicholas. Actually, for Nic, his name is pronounced the same way that Nicholas is.
Nicolas de Lenfent is a fictional character in Anne Rice's "The Vampire Chronicles". He is the companion of Lestat de Lioncourt, and the two had a romantic relationship. He is the founder of Théâtre des Vampires, and often nicknamed "Nicki".