Prince Frederik of Luxembourg, 22, succumbed to POLG mitochondrial disease. Despite his struggles, he raised awareness through his foundation.

Luxembourg's Prince Frederik Dies at 22 ... and his elder siblings, Princess Charlotte, 29, and Prince Alexander, 27. "It is with a very heavy heart that my wife and I would like to inform you ...

Prince Frederik of Luxembourg has died from a rare genetic disorder. His father, Prince Robert, shared the news through the foundation started by his son.

Grand Ducal Family of Luxembourg/Instagram Prince Frederik, the youngest son of Prince Robert of Luxembourg and Princess Julie ... his sister, Charlotte; me; his three cousins, Charly, Louis ...

Prince Frederik, the son of Europe's Prince Robert of Luxembourg, has died from a rare genetic disease, his family announced.

The people of Luxembourg are in mourning ... siblings Prince Alexander and Princess Charlotte, and other family members to his room to speak to him one last time. "Frederik's last question ...

The son of Prince Robert of Luxembourg and Princess Julie of Nassau ... Along with their son Frederik, Robert and Julie share two other children: Prince Alexander and Princess Charlotte. The late ...

Prince Frederik of Luxembourg spoke about his PolG diagnosis and what brought him solace in an emotional video that has ...

Grand Ducal Family of Luxembourg/Instagram Prince Robert of Luxembourg and Princess Julie of Nassau with their three children, Prince Frederik, Prince Alexander and Princess Charlotte. Related: ...