The white grape variety (also WÃ¼rzburg 48-21-4) is a new breed between Muller-Thurgau x Siegerrebe. The crossing was made in 1948 by Dr. Hans Hans Breider (1908-2000) at the Bavarian State Research Center for Wine, fruit and horticulture in Wuerzburg. The breeder named it after his favorite philosopher, the Spanish poet JosÃ© Ortega y Gasset (1883-1955). The Plant Variety Protection was granted in 1981. The vine occupied 622 acres of vineyards in Germany in 2009, the trend is strongly downward.