In the last week I have studied the pedigree of the Bourbon-Parma-family. And there I have learned that Prince Rene of Bourbon-Parma was married to a Danish Princess, Margaret. They have a daughter, the late Queen Anne-Marie of Romania. At the english article of wikipedia there is said that Marguerite (so her name after her marriage) and Rene had also three sons. Are there any information about her three sons?