Of course there are a couple of well-known actresses named Christopher, but one can only do so much. I think it's fair to say that our default assumption about a Christopher is male.
One of my sisters-in-law is named Kristi (that's her full given name, her father came from Norway), sometimes called Kris. She married my brother Rick, and their first son is Erik. When they had a second, they wanted to call him Kristopher (keeping up the K theme, and also honoring the Norwegian spelling which they like), but hesitated because people might call him Chris, the same as his mother, and he'd probably hate that. But thenthey decided he'd be called Kit for short, which we all like, so that was OK and Kristopher he is.
Except now, at the age of 7, he's declared that he hates "Kit" and demands to be called by his middle name (same as mine), Alan. He's stuck with it for over a year, so I guess he means it.