Refers to the fairy-tale character Snow White. Used in the title of the story and to refer to the character herself.
「白雪姫」はグリム童話の一つです。
"Snow White" is one of Grimm's Fairy Tales.
白雪姫は七人の小人と暮らしました。
Snow White lived with the seven dwarfs.
From 白雪 (しらゆき, 'white snow') + 姫 (ひめ, 'princess'). The name is a direct translation of the German 'Schneewittchen' (Snow White).