Hi there - it really doesn't matter what other people and friends call their babies - if you like the name, go ahead and name her that! This happened to me with 2 friends using the 2 names I liked - one had her baby before me - the other was due a month after me but went and told everyone they were using that name once she heard that I liked it as well!
I said - stuff it! I'm calling him what I want. I heard that my friend went round saying how I had "stolen" her name, but she still called him the same anyway. Who knows if I'll be friends with them in 5, 10, 20 years time - but I will still have my son so I wanted the best name for him.