Cheyk

"This fair maid is Chella, daughter of Cheyk, leader of the Black Ears."

- Tyrion Lannister

Cheyk is a character mentioned in the first season episode "The Pointy End". He is a member of the Black Ears, one of the hill tribes of the Mountains of the Moon in the Vale of Arryn. He's the father of Chella, current leader of the Black Ears.

In the books
In the A Song of Ice and Fire novels, Cheyk, father of Chella, is a chieftain of the Black Ears.