From A Wiki of Ice and Fire
|Alias||The Bad Apple|
|Allegiance|| House Fossoway|
Band of Nine
|Book(s)||The World of Ice and Fire (mentioned)|
Ser Derrick Fossoway, dubbed the Bad Apple, was a member of House Fossoway and an exiled knight from Westeros with a black reputation. He became one of the infamous Band of Nine, the instigators of the War of the Ninepenny Kings.