Dornishmen have a reputation for hot-bloodedness. They differ both culturally and ethnically from other Westerosi due to the historical mass immigration of Rhoynish people. They have adopted many Rhoynish customs as well, including equal primogeniture. Dorne was the only kingdom in Westeros to successfully resist Aegon's conquest, even killing one of his dragons during the war. It was conquered by Daeron I over a century after the Targaryen invasion, but rose against him leading to his death. Finally under Daeron's cousin Daeron II they joined through marriage. This accomplishment has allowed Dorne to retain a measure of independence. Lords of the ruling House Martell still style themselves "Prince" and "Princess" in the Rhoynish fashion. Unlike most of the rest of Westeros, illegitimate children born in Dorne are treated nearly the same as legal offspring and given the surname Sand, as with Westerosi customs to give bastards a surname showing their origins.