Naerys Targaryen

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

Naerys Targaryen was the sister-wife of Aegon IV Targaryen, the eleventh king of the Targaryen dynasty to sit on the Iron Throne. She was an ancestor of Viserys and Daenerys Targaryen.

Background
Queen Naerys was the mother of Daeron II Targaryen and Daenerys Targaryen by her brother-husband, King Aegon IV Targaryen, who had an affair with their cousin, Daena Targaryen.

Season 1
Naerys and her children are mentioned in House Targaryen's entry of the book The Lineages and Histories of the Great Houses of the Seven Kingdoms

In the books
In the A Song of Ice and Fire novels, Naerys was the sister of Aegon IV, who was also her husband, and the legendary Prince Aemon, called the Dragonknight. Naerys had the classic Targaryen looks, a very fine and delicate beauty. She was very slender and small, with big purple eyes and fine, pale, porcelain skin, near translucent.

According to semi-canon sources, she almost died in the cradle and was sickly for most of her life. She was a devout follower of the Faith of the Seven, and once Daeron was born she asked Aegon to release her from her vows so she could join the Faith but he refused her. She was unhappy in her marriage and it was said only her son Daeron or her brother Aemon could make her smile. Her brother, Prince Aemon championed her against the slanders of Ser Morgil and was rumored to, not only have loved her, but also to be the true father of Daeron II. Much later in her life she gave birth to a daughter, Daenerys.