From A Wiki of Ice and Fire
House Burley (possibly)|
|Culture(s)||Rivermen or northmen|
Fire & Blood (mentioned)|
The Princess and the Queen (mentioned)
Following the Second Battle of Tumbleton, Lord Benjicot Blackwood had Billy mercy kill Tessarion, the she-dragon of the late Prince Daeron Targaryen. From one hundred yards away Billy fired three shafts through the eye of the wounded dragon.