Prince Leopold, Duke of Brabant

[LouisFerdinand]

Prince Leopold of Belgium was born inn 1859. He was the only son of the future King Leopold II and Queen Marie Henriette of the Belgians.   
At birth Leopold was styled Count of Hainaut, as the eldest son of the then crown prince (the future Leopold II).   
When Leopold II became sovereign, Prince Leopold became Duke of Brabant.       
He did not succeed his father as King Leopold III. Poor Leopold died in 1869 from pneumonia after falling into a pond.

[Curryong]

^ This was certainly devastating for his father, who was succeeded as Monarch by his nephew, Albert the hero King. Leopold, a disgraceful individual, was very unhappily married to Marie Henriette, and the home that their children grew up in (there were two daughters as well) was a miserable one.

[LouisFerdinand]

After his demise, Prince Leopold's parents. Prince Leopold Louis and Princess Marie Henriette had one more child. She was their daughter, Princess Clementine.