Hiccup is the only son of Stoick the Vast. Stoick is a perfect leader of the tribe of Vikings on the island of Berk. Being the chief makes him like a king. Which makes Hiccup like a prince.

You are the first born child of the King and Queen of Luminary. Your parents sent out letters to kings to have their sons battle for your heart.

Stoick gets a letter too. Now Hiccup & his family, along with other Vikings, are on a ship to your kingdom, where Hiccup will battle to win your heart.