Rhaella Targaryen

Rhaella Targaryen, is an unseen character in Game of Thrones. She is deceased when the events of the series begin and is not expected to appear in the series.

Rhaella Targaryen was the wife of King Aerys II Targaryen. They had three children Rhaegar, Viserys and Daenerys. House Targaryen was deposed as the ruling house of Westeros during Robert's Rebellion. Aerys and Rhaegar were killed during the rebellion while Rhaella fled to the family's ancestral seat Dragonstone with her youngest son Viserys. Rhaella died giving birth to Daenerys on Dragonstone during a great storm.

In the books
In the Song of Ice and Fire novels, Rhaella is the wife of Aerys II and the mother of Rhaegar, Viserys and Daenerys.