Mors Martell, as depicted by Karla Ortiz in The World of Ice & Fire
When Nymeria led the Rhoynar refugees to Dorne in southern Westeros, the lands of the Martells paled in comparison to those of House Yronwood. The marriage of Lord Mors to Nymeria gave the Martells the manpower to conquer the rest of Dorne and gave the Rhoynar a new homeland. The Dornish rulers have since styled themselves "Prince" in the Rhoynish fashion rather than "King". Mors was slain by King Yorick V Yronwood in the Third Battle of the Boneway, but Nymeria forced Yorick to submit two years later.
of Ny Sar