Of Italian origin.

From the name Sienna, spelled according to the name of the Italian city Siena.

The city of Siena is proclaimed by Unesco as a World Heritage site.

Sienna is the word used to define the color deriving from clay earth pigment “sienna”, which has this orange-red look because it contains iron and manganese oxide.

It’s origin is Italian, from “terra di Siena”, meaning ” Siena earth”.

Alternative form of the name is Sienna.