SiennayoudaoicibaDictYouDict[Sienna 词源字典]
city in central Italy, probably from Senones, the name of a Gaulish people who settled there in ancient times. Related: Sienese. The brownish-ochre color (1760) is from Italian terra di Sienna "earth of Siena," where the coloring material first was produced.[Sienna etymology, Sienna origin, 英语词源]