Volarik

Volaric is an unseen character mentioned in the episode "The Mountain and the Lion". He was the Maester of Casterly Rock.

Biography
Volaric was the maester serving House Lannister during the youth of Tyrion Lannister.

Season 4
While reminiscing about Orson Lannister, Tyrion mentions he visisted Volaric's library looking for some reading that would help him understand Orson's mindset and his tendency to kill beetles. Jaime mentions that Volaric had tried to touch him once.

In the books
In the A Song of Ice and Fire novels, there is no mention of a maester named Volaric. The only known maester bound to Casterly Rock is Creylen, serving House Lannister at the time of the books.