What does the name Sienna mean? The meaning of the name Sienna is Reddish Brown. The origin of the name Sienna is Italian. This is the culture in which the name originated, or in the case of a word, the language.
Alternate spellings: Siena
People who like the name Sienna also like: Scarlett
, Savannah Liam
Name Notes: Sienna Miller, actress.