Princess Daella Targaryen was the daughter of King Jaehaerys I Targaryen and Queen Alysanne Targaryen. She married Lord Rodrik Arryn, and together they had one child: Aemma Arryn.
Princess Daella was the fifth of the thirteen children born to King Jaehaerys and his wife Queen Alysanne, and one of only nine to live until adulthood.
In 80 AC, Daella married the Lord of the Eyrie, Lord Rodrik Arryn. They had one child together, a daughter named Aemma Arryn. However, Daella died giving birth to Aemma, in 82 AC.
Aemma would marry Daella's nephew, Prince Viserys Targaryen. When Viserys was crowned King of the Seven Kingdoms, Aemma became a Queen.