House of Bourbon-Montpensier
The House of Bourbon-Montpensier or Maison de Bourbon-Montpensier was a semi royal family. The name of Bourbon comes from a marriage between Marie de Valois, comtesse de Montpensier (1375–1434) who married Jean de Bourbon - the duc de Bourbon. The second name of Montpensier, comes from the title of the family.
The Bourbon-Montpensier family were the founders of the vast wealth that would later be enjoyed by the House of Orléans and their cousins the Bourbon-Penthièvres.