Frederick I von Staufen (1050-July 21 1105) was Duke of Swabia from 1079 to his death. He was the first ruler of Swabia of the House of Hohenstaufen. In 1089, Frederick married Agnes of Germany, daughter of Henry IV, Holy Roman Emperor. They had several sons and daughters, amongst whom were: * Frederick II of Swabia (1090-1147), the father of Frederick Barbarossa * Conrad III, king of Germany (1093-1152) Wikipedia
The definitive Wikipedia entry for Frederick I, Duke of Swabia. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Frederick_I,_Duke_of_Swabia
The definitive Wikipedia entry for Frederick I, Duke of Swabia. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Frederick_I%2c_Duke_of_Swabia