Welf II was a Swabia

Swabia

Swabia is a cultural, historic and linguistic region in southwestern Germany.-Geography:Like many cultural regions of Europe, Swabia's borders are not clearly defined...

n count and a member of the Elder House of Welf

Elder House of Welf

The Elder House of Welf was a dynasty of European rulers in the 9th through 11th centuries to 1055. It consisted of two groups, a Burgundian group and a Swabian group. It is disputed whether the two groups formed one dynasty or whether they shared the same name by coincidence only.-Burgundian...

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He opposed the election of Conrad II

Conrad II, Holy Roman Emperor

Conrad II was Holy Roman Emperor from 1027 until his death.The son of a mid-level nobleman in Franconia, Count Henry of Speyer and Adelaide of Alsace, he inherited the titles of count of Speyer and of Worms as an infant when Henry died at age twenty...

 in 1024 because it did not suit his interests, but he had to eventually relent.

In the 1020s, Welf feuded with the dioceses of Augsburg and Freising; he pillaged the treasury of Bruno, Bishop of Augsburg, and sacked the city of Augsburg

Augsburg

Augsburg is a city in the south-west of Bavaria, Germany. It is a university town and home of the Regierungsbezirk Schwaben and the Bezirk Schwaben. Augsburg is an urban district and home to the institutions of the Landkreis Augsburg. It is, as of 2008, the third-largest city in Bavaria with a...

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Sources

• Reuter, Timothy
  Timothy Reuter
  Timothy Alan Reuter , grandson of the former mayor of Berlin Ernst Reuter, was a German-British historian who specialized in the study of medieval Germany, particularly the social, military and ecclesiastical institutions of the Ottonian and Salian periods .Reuter received his D.phil from Oxford in...
  
  . Germany in the Early Middle Ages 800–1056. New York: Longman, 1991.