What is "bligny"

Bligny is the name or part of the name of the following communes in France:

• Bligny, Aube, in the Aube department
• Bligny, Marne, in the Marne department
• Bligny-le-Sec, in the Côte-d'Or department
• Bligny-lès-Beaune, in the Côte-d'Or department
• Bligny-sur-Ouche, in the Côte-d'Or department