When I look at this adorable little girl picking buttercups, I immediately think of the movie "The Princess Bride" whose main character is a peasant girl named Buttercup. As delicate and nice as the flower is, it does not make the best name, as flower names go. Let's give this girl a few different sorts of names. First, an appropriate flower name. Second, an appropriate princess name. Third an appropriate medieval peasant girl name. Fourth, a hippie name. Fifth, a more modern 'country' name. And sixth, a nice name that would work nowadays.