Trefethen Family VineyardsDragon's ToothOur Nana, Catherine Trefethen, was Welsh. Her twin loves of wine and family were the original inspiration for our estate in Napa Valley’s Oak Knoll District. Celebrating our heritage, “Y Ddraig Goch”, the symbol of Wales, adorns this bottle of Dragon’s Tooth, a provocative blend born from the rockiest part of our vineyard.