[2] As a Grandson of France, he was allowed the style of Royal Highness and from his birth, was the fourth male in the kingdom after Louis XIV, the Duke of Anjou and his father, Gaston.

His birth was greatly celebrated by his older half-sister, Anne Marie Louise, "la Grande Mademoiselle"[3] who ordered a large fireworks display in Paris to celebrate his birth.

[4] He was adored by la Grande Mademoiselle despite the child always having frail health; he was never able to walk and could not speak - Jean Gaston had a crooked leg which had been attributed to the Duchess of Orléans lying on her side throughout her pregnancy.

[4] The little Duke of Valois died at the Palais d'Orléans of diarrhoea[1] and was greatly mourned by his parents and half sister.

He was buried at the Royal Basilica of Saint Denis outside Paris, the traditional burial place of the House of Bourbon.