It wouldn't bother me one bit how popular my childs name is if i loved it!! With my 3rd we were trying to pick out of Kobi, Remy and Ella, clearly ella is far more popular than the other two but in the end it was our favourite. I also think that popularity in a name is a compliment, alot of people love it so thats a good thing to me. Finn is such a cute name, i really like it. Goodluck with your decision..