Baelor Targaryen (son of Daeron II)

Baelor Targaryen is an unseen character in Game of Thrones. He is not expected to appear in the series, being long dead by the time it begins.

Background
Baelor was the eldest son of King Daeron II Targaryen and Queen Myriah Martell. He was the brother of Aerys, Rhaegel, Maekar and Aelinor.

Season 1
Prince Baelor, along with his family, is mentioned in the House Targaryen's entry of the book The Lineage and Histories of the Great Houses of the Seven Kingdoms.

In the books
In the A Song of Ice and Fire novels, Prince Baelor was the eldest son of King Daeron and was his father Hand of the King. At some point, he was given the title of Protector of the Realm. He had two sons, Valarr and Matarys.