The House of Húrin were the descendants of Húrin of Emyn Arnen, the Steward to King Minardil of Gondor. For this the House was also known as House of the Stewards. Húrin and his House were noted as being of high Númenórean blood, but they were not members of the Royal House of Gondor itself.[1]
After Húrin's time it became traditional for the Steward to be chosen from among his descendants, and in the time of Vorondil the Hunter who succeeded his father, the Steward Pelendur, the post became hereditary. Vorondil's horn became a hereditary heirloom, carried by the heir. After the loss of Gondor's last King, Eärnur, the Stewards of the House of Húrin took up the rule of the South-kingdom. That was until the War of the Ring. Faramir, the heir of Denethor became Prince of Ithilien and Lord of Emyn Arnen, the lands of the House's patriarch.