. "Frederick I"@en . . "1105-07-21Z"^^ . . "Duke of Swabia"@en . "1105Z"^^ . "Duke of Swabia (1079-1105)" . "1050Z"^^ . "Frederick I (c. 1050 \u2013 before July 21, 1105) was Duke of Swabia from 1079 to his death, the first ruler from the House of Hohenstaufen (Staufer)."@en . . "Frederick I, Duke of Swabia"@en . "Friedrich I., Herzog von Schwaben (German)"@en . .