Sienna is a female given name and is of Italian origin. It means from Siena; Reddish brown. Pronounced as see-EN-ah, the name is currently in the top 500 of NameChef Most Popular Baby Names and in the top 500 of U.S birth chart of the year 2019.
Siena, a city in Tuscany, in Italy is known for its art treasures. The town gave its name to a reddish shade of brown.
Sienna is a girl's name.
(Or listen to the pronunciation from https://www.pronouncenames.com/search?name=sienna)