My story is set in a fantasy universe strongly based on Victorian England. From reading a few steampunk books, I've learned that people living in such a society refer to others with their surname and title (like that Mr. Darcy I keep hearing so much about). It's faux-pas to refer to someone with their Christian (given) name before you share a close enough relationship with them. I've also learned that this rule doesn't usually apply to children. But, my main characters are in that awkward in-between teenager stage, and are attending a school. What type of name should they refer to other students by? I know since it's a fantasy land such accuracy isn't required. But I really want to give the story that Victorian air, and my world some credibility. Help please!