Game Of Thrones Series
House Martell of Sunspear is a legally extinct Great House of Westeros. It ruled the peninsula of Dorne in the far south of the continent from their castle Sunspear. Though loyal to the Iron Throne, the Martells were never conquered by the Targaryens and pursued a more isolated role in wider political events since Robert's Rebellion.
House Martell's sigil is a red sun pierced by a golden spear, on an orange field, a combination of the original Martell sigil - a yellow spear - and the emblem of Princess Nymeria - a red sun - to symbolize the marriage of the warrior-queen to Mors Martell. Their house words are "Unbowed, Unbent, Unbroken."
With the assassinations of Prince Doran Martell and his only heir, Prince Trystane, by Ellaria Sand and the Sand Snakes, House Martell is legally extinct, although the Sand Snakes themselves carry Martell blood through their father Oberyn. The Sand Snakes also continue to use the Martell sigil to represent themselves and Dorne.