In the series A Song of Ice and Fire, who is the founder of House Tarly?
House Tarly's ancestry can be linked to Harlon the Hunter, who built the Horn Hill castle with his twin brother Herndon of the Horn.
Instruction: In the series A Song of Ice and Fire, who is the founder of House Tarly?
Context: 
Response: House Tarly's ancestry can be linked to Harlon the Hunter, who built the Horn Hill castle with his twin brother Herndon of the Horn.