|Died||In 47 ᴀᴄ|
|Book(s)||The World of Ice & Fire (mentioned)|
Ser Theo was married to Elinor Costayne, and they had three children. Ser Theo was arrested by knights of the Kingsguard, accused of conspiring with Queen Alyssa Velaryon to place her son, Prince Jaehaerys, on the throne, and was then executed—all on the same day.
- The World of Ice & Fire, The Targaryen Kings: Maegor I.