In this article we highlight the role played by widows in French Family businesses. We take a historical point of view in order to highlight the significance of our topic. We show the role of French family law in enabling widows to become entrepreneurs. Then we relate the life of the wife of a company owner, in a French family business created at the beginning of the 20th century. We show why and how a spouse becomes an entrepreneur when her husband dies. We demonstrate what key roles she plays in maintaining the business within the realm of the family.