Editing Hohenstaufen (section)

==Origins==
The origin remains unclear, however, Staufer counts are mentioned in a document of emperor [[Otto III, Holy Roman Emperor|Otto III]] in 987 as descendants of counts of the region of ''Riesgau'' near [[Nördlingen]] in the [[Duchy of Swabia]], who were related to the [[Duchy of Bavaria|Bavarian]] ''[[Sieghardinger]]'' family. A local count Frederick (d. about 1075) is mentioned as progenitor in a pedigree drawn up by Abbot [[Wibald|Wibald of Stavelot]] at the behest of Emperor Frederick Barbarossa in 1153. He held the office of a Swabian [[count palatine]]; his son [[Frederick of Büren]] ({{Circa|1020}}–1053) married Hildegard of [[Eguisheim|Egisheim]]-[[County of Dagsburg|Dagsburg]] (d. 1094/95), a niece of [[Pope Leo IX]]. Their son [[Frederick I, Duke of Swabia|Frederick I]] was appointed [[Duke of Swabia]] at Hohenstaufen Castle by the [[Salian dynasty|Salian]] king [[Henry IV, Holy Roman Emperor|Henry IV of Germany]] in 1079.<ref name="Görich2011">{{cite book|author=Knut Görich|title=Friedrich Barbarossa: Eine Biographie|url=https://books.google.com/books?id=35SwS1j6dowC|date=22 November 2011|publisher=C.H.Beck|isbn=978-3-406-62149-9}}</ref><ref>{{cite web |url=https://www.deutsche-biographie.de/gnd139800247.html#ndbcontent |title=Sighardinger (Sieghardinger, Sigehardinger) |publisher=   Deutsche Biographie   |access-date=February 28, 2020 }}</ref><ref name=grin/>

At the same time, Duke Frederick I was engaged to the king's approximately seventeen-year-old daughter, [[Agnes of Waiblingen|Agnes]]. Nothing is known about Frederick's life before this event, but he proved to be an imperial ally throughout Henry's struggles against other Swabian lords, namely [[Rudolf of Rheinfelden]], Frederick's predecessor, and the [[House of Zähringen|Zähringen]] and [[House of Welf|Welf]] lords. Frederick's brother Otto was elevated to the [[bishop of Strasbourg|Strasbourg bishopric]] in 1082.<ref name=grin/><ref name="Muschka2012">{{cite book|author=Wilhelm Muschka|title=Agnes von Waiblingen - Stammmutter der Staufer und Babenberger-Herzöge: Eine mittelalterliche Biografie|url=https://books.google.com/books?id=ygN4DwAAQBAJ&pg=PA74|date=22 May 2012|publisher=Tectum Wissenschaftsverlag|isbn=978-3-8288-5539-7|pages=74–}}</ref>

Upon Frederick's death, he was succeeded by his son, Duke [[Frederick II, Duke of Swabia|Frederick II]], in 1105. Frederick II remained a close ally of the Salians, he and his younger brother [[Conrad III of Germany|Conrad]] were named the king's representatives in Germany when the king was in Italy. Around 1120, Frederick II married Judith of Bavaria from the rival [[House of Welf]].<ref name="Görich2011"/><ref name="Stürner2019">{{cite book|author=Wolfgang Stürner|title=Die Staufer: Eine mittelalterliche Herrscherdynastie - Bd. 1: Aufstieg und Machtentfaltung (975 bis 1190)|url=https://books.google.com/books?id=R5y6DwAAQBAJ|date=30 October 2019|publisher=[[Kohlhammer Verlag]]|isbn=978-3-17-035365-7}}</ref>