Ser Rickard Thorne was a sworn member of the Kingsguard during the Dance of the Dragons, during which he fought for King Aegon II Targaryen. He was killed by a mob in Bitterbridge whilst trying to protect the young prince Maelor Targaryen.
House Thorne followed House Targaryen during Robert's Rebellion, with Ser Alliser Thorne serving in the capital. He was present when Tywin Lannister descended on the city and survived the Sack of King's Landing. He chose to go to The Wall and join the Night's Watch instead of being executed.
A Game of ThronesEdit
Alliser has risen to serve as Master-at-Arms of Castle Black since his arrival at the Wall, and Lord Commander Jeor Mormont has him training new recruits. This brings him into conflict with Jon Snow and Samwell Tarly. Jeor sends him to King's Landing to petition for more men after an attack by wights. He is given the hand of Othor.