In the series A Song of Ice and Fire, who is the founder of House Clegane?
The name of House Clegane's founder is unknown. He was a kennelmaster of Casterly Rock and saved Lord Tytos Lannister from a lionness. As a reward, Lord Lannister granted the unnamed Clegane a knighthood.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: In the series A Song of Ice and Fire, who is the founder of House Clegane?
### Input: 
### Response: The name of House Clegane's founder is unknown. He was a kennelmaster of Casterly Rock and saved Lord Tytos Lannister from a lionness. As a reward, Lord Lannister granted the unnamed Clegane a knighthood.