House of Bourbon-Montpensier
The House of Bourbon-Montpensier or Maison de Bourbon-Montpensier was a semi-royal family. The first part, Bourbon, comes from the marriage of Marie de Valois, comtesse de Montpensier (1375–1434) and Jean de Bourbon, duc de Bourbon.
Source: Wikipedia — House of Bourbon-Montpensier (CC BY-SA 4.0)