Prince Héritier
The Dolphin (the French Crown Prince)
crown prince is called as a queen. therefore crown prince and prince is different.
Crown Prince Hohenzollern went by Crown Prince Wilhelm.
In French, to say "Sweet Prince", you can say "doux prince" or, if sweet means candies, "prince de bonbons", but I think you wanted to know the first.
A Crown Prince or Crown Princess is the heir or heiress apparent to the throne in a royal or imperial monarchy.Prince, from French "Prince" (itself from the Latin root princeps), is a general term for a monarch, for a member of a monarchs' or former monarch's family, and is a hereditary title in some members of Europe's highest nobility. The feminine equivalent is a princess.
His Royal Highness, the Crown Prince.
Crown Prince Sohyeon was born in 1612.
Crown Prince Sohyeon died in 1645.
Crown Prince Uikyung died in 1457.
Crown Prince Uikyung was born in 1438.
Crown Prince Sado died in 1762.
Crown Prince Sado was born in 1735.