From the Spanish Gonzalez Byass family winery Gonzalez Byass, one of the largest and oldest wineries in the Jerez appellation, best known for its flagship sherry brand, TIO PEPE.The Gonzalez Byass family company was founded in Jerez in 1835 and is now in its fifth generation. It is the original producer of sherry and Jerez brandy. The "Tio Pepe" sherry is sold in 115 countries around the world.