From A Wiki of Ice and Fire
|Book||The Hedge Knight (appears)|
Yorkel was a guardsmen in service to House Targaryen during the reign of King Daeron II Targaryen.
Yorkel was among the guardsmen that accompanied Prince Aerion Targaryen to Ashford for the tourney. He was one of the guardsmen who helped Prince Aerion destroy the puppeteer's stall after Aerion took issue with their skit involving a dragon.