Christina. Ehhhh, it's way too common and people always call me ChristinE. Though, the story behind it is unique.

It was my dad's turn to name me and his choices were Margarita OR Beatrice. All during the pregnancy my older brother always wanted a brother named Christopher. My Mom wouldn't allow dad to name me either of those names, so at the last minute (when the papers came around) named me Christina. So basically my brother named me.