Vashti

"The Complete Book of Muslim and Parsi Names" by Maneka Gandhi and Ozair Husain lists Washti as a Persian name meaning "beauty; goodness", and writes that it is associated with the story of Esther. I assume that Washti is the Persian form of Vashti.

It is derived from the Persian root/word vashta, meaning good or beautiful. It is unique in the sense that it is one of the few proper names in the Tanakh to begin with the letter "waw."

I was looking up the name a few nights ago, and I found that it was indeed of Persian origin. The site I was looking on, which escapes me now, had it listed as meaning beautiful or pure.