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In the world, Siena (Siena , Sienne , シエナ ) is quite a rare primarily feminine, but very infrequently masculine first name. The first name Siena is characteristic of South Africa, where it is quite a rare girly name, Israel, where it is a rare girly name, and Philippines. Not in comparison with a country's population, it is commonest in South Africa, Philippines, and the United States. Also, Siena is the last name as well as the forename.
Siena is also a name for the fictitious and mythical characters: Siena Blaze , the fictional character in Marvel Comics; Sienna Blake , the character on British soap opera, Hollyoaks, portrayed by Anna Passey and Sienna Cammeniti , the Fictional Character, Neighbours.