From A Wiki of Ice and Fire
The name Jaehaerys or Jaehaerys Targaryen can refer to the following members of House Targaryen:
- 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, son of King Aerys II Targaryen and Queen Rhaella Targaryen, who died young.