From A Wiki of Ice and Fire
Jaehaerys Targaryen is the name of several members of House Targaryen. These include:
- King Jaehaerys I Targaryen, fourth Targaryen King on Iron Throne, third son of King Aenys Targaryen and Queen Alyssa Velaryon.
- Prince Jaehaerys Targaryen, eldest son of King Aegon II Targaryen and Queen Helaena Targaryen, who died during the Dance of the Dragons.
- King Jaehaerys II Targaryen, sixteenth Targaryen King on Iron Throne, second son of King Aegon V Targaryen and Queen Betha Blackwood.
- Prince Jaehaerys Targaryen, fourth son of King Aerys II Targaryen and Queen Rhaella Targaryen, who died young.
- Jaehaera Targaryen, only daughter of King Aegon II Targaryen and Queen Helaena Targaryen, first queen of King Aegon III.