Gwen

fem. proper name; the first element is Breton gwenn "white" (source also of Welsh gwyn, Old Irish find, Gaelic fionn, Gaulish vindo- "white, shining," literally "visible"), from nasalized form of PIE root *weid- "to see."

fem. proper name, from Italian, fem. of bianco "white," which is from Germanic (see blank (adj.)). A doublet of French Blanche, which also is from Germanic, and compare Gwen, which means the same.