From A Wiki of Ice and Fire
|Title||Lord of Mistwood|
|Book||Fire & Blood (mentioned)|
Jon Mertyns was the Lord of Mistwood and head of House Mertyns during the early reign of King Jaehaerys I Targaryen.
Lord Jon attended the Golden Wedding, where the king entertained the lords in the intimacy of his solar, encouraging them to speak freely and share their views on the problems of the realm and how they might best be overcome. Lord Jon approved of Jaehaerys, saying, "He laughs often and freely, even at himself."
- ↑ 1.0 1.1 Fire & Blood, The Year of the Three Brides - 49 AC.