Thread:Shaira Sultana/@comment-25545053-20141203123558/@comment-6268337-20141203143416

CatFun123:

It's too obscure a piece of trivium to use on her profile, so I deleted it. It would be just as easy to say that she is named after the city of Sienna Plantation, Texas or Sierra County, New Mexico, or the Italian city of Sienna (or Siena, depending on how you spell it).

Most likely, the name is based off the color (which is a shade of orange or brown) than it is from the city.