Moryn Tyrell

Ser Moryn Tyrell was the youngest brother of Lord Luthor Tyrell of Highgarden, his other brothers Gormon and Garth Tyrell, and the uncle of Mace Tyrell. He married and had two children, Luthor and Leo Tyrell. He was killed during the wildfire explosion of the Great Sept of Baelor, alongside most of the rest of his family, although his grandson and great-grandson, Theodore and Luthor, survived, becoming the heads of House Tyrell.