Jorah Mormont 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 A Game of Thrones (1996), Jorah is a knight in exile, the disgraced former lord of Bear Island, and the only son of Jeor Mormont, the honorable lord commander of the Night's Watch. Jorah subsequently appeared in Martin's A Clash of Kings (1998), A Storm of Swords (2000), and A Dance with Dragons (2011).
https://en.wikipedia.org/wiki/Jorah_Mormont