After betraying the blacks to join the greens and announcing his ambitions to become king himself, Hugh Hammer, one of the Two Betrayers, began amassing a following of sellswords, robber knights, and other rabble.
During the tourney at Ashford Meadow, Prince Maekar is initially absent, as he's searching for his sons Daeron and Aegon, having heard wild tales of robber knights around. Later, Prince Daeron accuses Ser Duncan the Tall of kidnapping Aegon, to avoid admitting he has spent the days drinking.
After returning from the War of the Ninepenny Kings, Ser Tywin Lannister charged Ser Kevan Lannister, his younger brother, with command of a company of five hundred knights to rid the Westerlands of robber knights and outlaws.
A Storm of Swords
After the brotherhood without banners seizes his gold and give him a note promising to pay once the War of the Five Kings is done, Sandor Clegane accuses Ser Beric Dondarrion of being a robber knight.
A Feast for Crows
When Princess Arianne Martell and her party reach the well at Shandystone, she tells her companions of the time her uncle, Prince Oberyn Martell, took her and his daughters Tyene and Sarella Sand there. Arianne keeps to herself that while Oberyn taught Tyene to milk viper venom and Sarella turned over rocks to see what was underneath, she sat beside the well and fantasized a robber knight with the same features as her uncle had brought her to the well to have his way with her.
Known robber knights
- The Hedge Knight.
- A Feast for Crows, Chapter 4, Brienne I.
- Fire & Blood, The Sons of the Dragon.
- The Princess and the Queen.
- The Mystery Knight.
- The World of Ice & Fire, The Westerlands: House Lannister Under the Dragons.
- A Storm of Swords, Chapter 67, Jaime VIII.
- A Storm of Swords, Chapter 39, Arya VII.
- A Feast for Crows, Chapter 16, Jaime II.
- A Feast for Crows, Chapter 21, The Queenmaker.