Anguy
From A Wiki of Ice and Fire
Anguy, called The Archer, is a commoner from the Dornish Marshes who eventually joins the Brotherhood Without Banners, and is highly valued due to his exceptional skill with a bow.
At the tournament at King's Landing in celebration of Eddard Stark's ascension to Hand of the King, Anguy wins the archery competition, outshooting Ser Balon Swann of the Kingsguard and Jalabhar Xho at a hundred paces and earning himself a sum of ten thousand golden dragons. He refuses an offer from Eddard Stark to join the Hand's guard.
Having spent his riches on expensive whores and other lavish excesses, Anguy joins with the Brotherhood Without Banners and is part of the party that discovers and captures Arya Stark and brings her to Beric Dondarrion.