Ramsay Bolton

Ramsay Bolton, formerly known as Ramsay Snow and also as Bastard of Bolton or Bastard of the Dreadfort, is a fictional character in the A Song of Ice and Fire series of fantasy novels by American author George R. R. Martin, and its television adaptation Game of Thrones.

Introduced in 1998's A Clash of Kings, Ramsay is the eldest son of Roose Bolton, the lord of the Dreadfort, an ancient fortress in the North of the kingdom of Westeros. He is subsequently mentioned in A Storm of Swords (2000) and A Feast for Crows (2005). He later appears in Martin's A Dance with Dragons (2011).

https://en.wikipedia.org/wiki/Ramsay_Bolton