The white grape variety (also Würzburg 48-21-4) is a new variety between Müller-Thurgau x Siegerrebe, which was confirmed by DNA analyses published in 2012. The crossbreeding was carried out in 1948 by the breeder Dr. Hans Breider (1908-2000) at the Bavarian State Institute for Viticulture, Fruit and Horticulture in Würzburg. The breeder named it after his favourite philosopher, the Spanish poet José Ortega y Gasset (1883-1955). Plant variety protection was granted in 1981. Incidentally, the new varieties Muscabona, Tamara and Thekla were created with the same parents.