 Prince Doran and his wife, Princess Mellaria, have three children, Arianne, Quentyn and Trystane.During the War of the Five Kings, Tyrion Lannister, as Hand of the King, turns the historical enmity of House Martell and Dorne into an alliance by sending King Joffrey's middle sibling and sister, Myrcella Baratheon, as the betrothed future bride to Trystane, the youngest child of Prince Doran, who is about her own age.The eldest child of Prince Doran, Arianne, is heir to House Martell, Sunspear and the rule of Dorne.