Rhaenys Targaryen

From Asoiaf

Rhaenys of House Targaryen was the sister of Aegon I Targaryen, King of the Seven Kingdoms and Visenya Targaryen.

Together they sailed from Dragonstone to conquer the Seven Kingdoms during the Wars of Conquest.

Aegon I married both Rhaenys and Visenya. Rhaenys and Aegon had a son, Aenys I.