Tristan Corvo was a famous hero during the Fourth Age who originated from Karville.[1] He is notable for battling against the dragonkin and forcing them into hiding.
After the battle, he took a piece of the dragon key and he entrusted the key piece to his family members. One of his descendants, Sarah, lives in the town of Port Phasmatys.
References
^Tomb in Dragon Slayer II. Old School RuneScape. "Camorra came from the town of Saranthium and sat next to the one with a crossbow. The one from Zartharim sat at the north of the table, opposite the one with the sword. The one with an axe asked the one to their right what the journey from Karville was like. Suddenly, Aivas stood up, surprising the one from Arkney on his left. Tristan was showing off his sword when the bow wielder next to him called for silence."