The name Blanche is an American baby name. In American the meaning of the name Blanche is: White. The name Blanche is a French baby name. In French the meaning of the name Blanche is: White; shining. Numerology. People with this name have a deep inner desire for a stable, loving family or community, and a need to work with others and to be appreciated. People with this name tend to be passionate, compassionate, intuitive, romantic, and to have magnetic personalities.