Princess Marie of Orléans was a French princess by birth and a Danish princess by marriage to Prince Valdemar. She was politically active by the standards of her day.
Prince Aage, Count of Rosenborg, was a Danish prince and officer of the French Foreign Legion. He was born in Copenhagen the eldest child and son of Prince Valdemar of Denmark and Princess Marie d'Orléans.
The Yellow Palace, Copenhagen: Prince Aage's childhood home