From A Wiki of Ice and Fire
|Personal arms||A hourglass upon blue pale with white borders dividing a gold field|
|Book||The Hedge Knight (mentioned)|
Ser William Tortoll was a knight during the reign of King Daeron II Targaryen.
William participated in the tourney at Ashford Meadow in 209 AC.
Behind the scenes
The character is named after Bill Tortolini, the letterer for the graphic novel adaptation of George R. R. Martin's Dunk and Egg.