The name Sienna is a girl's name of Italian origin. Sienna is ranked #236 on our popularity charts and is often added to lists like Color Names for Babies and discussed in our forums with posts like "A brother or sister for little Jack or Olivia".
From the experts:
The historic Tuscan city is spelled Siena, but the Sienna spelling, used by American-born English actress Miller, is rising even faster. Cable newsperson Campbell Brown chose Sienna for her daughter, as did Kevin James.
Sienna is currently popular throughout the English-speaking world; it's Number 23 in Australia, 26 in England and Wales, and also in the Top 100 in Canada, New Zealand, Ireland and Scotland.