why does she call herself dakota and not hannah which is her first name?

I saw a video but I couldn't find it again but it was like this

"My dad named me Dakota and my mom came up with my first name Hannah. So it's Hannah Dakota Fanning"

Maybe is cuz she likes еще Dakota....and Hannah Fanning sound like hannah montana...!

"I feel еще like a Dakota then a Hannah. Not that I don't like the name Hannah"

Dakota songs better, and maybe her parents use to call her Dakota.

Cause some people use to call her Dakota еще then hannah and some people just like there middle names better then her first name but i sure wouldnt wanna be know for my middle name its to common

Well, her parents probably started to call her Dakota so it just stayed.