George R.R. Martin
AS SEEN IN:
'Game Of Thrones'
Castle Black, the Wall, Westeros, Mondas
From the "Game of Thrones Wiki":
Aemon is a recurring character in Game of Thrones. He is played by guest star Peter Vaughan and débuts in the third episode of the first season.
Aemon is the maester at Castle Black and is one of Lord Commander Jeor Mormont's closest advisers in the Night's Watch. He was once a member of House Targaryen before he joined the order of maesters and dropped his house name, but this has been long forgotten by most. He has served as the Maester at Castle Black for decades.