Frederick II, Duke of Swabia

Frederick II (1090 – 6 April 1147), called the One-Eyed, was the second Hohenstaufen duke of Swabia from 1105. Events 46 BC - Julius Caesar defeats Caecilius Metellus Scipio and Marcus Porcius Cato in the Battle of Thapsus The following is a list of Dukes of Swabia in southwest Germany He was the eldest son of Frederick I and Agnes. Frederick I von Staufen (1050&ndash July 21 1105) was Duke of Swabia from 1079 to his death Agnes of Germany (1072 &ndash September 24, 1143) was the daughter of Henry IV Holy Roman Emperor and Bertha of Savoy.

He succeeded his father in 1105. In 1121 he married Judith of Bavaria, a member of the powerful House of Guelph. See also Elder House of Welf The House of Welf (or House of Guelph) is a European Dynasty that has included many German and British On the death of Emperor Henry V, his uncle, Frederick stood for election as King of the Romans with the support of his younger brother Conrad, duke of Franconia and several houses. Henry V ( 8 November 1086 &ndash 23 May 1125) was King of Germany (from 1098-1125) and Holy Roman Emperor King of the Romans ( Latin: Rex Romanorum) was the title used by the elected ruler of the Holy Roman Empire, the Imperator futurus Conrad III (1093 &ndash 15 February 1152) was the first King of Germany of the Hohenstaufen dynasty Franconia (Franken is a historic region of Germany comprising the northern parts of the modern state of Bavaria and the area to its immediate west However, he lost this election of 1125 to Lothar III, crowned Emperor later in 1133. Lothair III of Supplinburg (1075 &ndash 1137 was Duke of Saxony (1106 King of Germany (1125 and Holy Roman Emperor from 1133 to 1137

A conflict erupted between Frederick and his supporters, and Lothar. Encouraged by Albert, Archbishop of Mainz, who loathed the supporters of the late Emperor Henry V, Lothar besieged Nuremberg in 1127. Frederick relieved the siege of Nuremberg in 1127 and occupied Speyer in 1128. The attempt of Henry the Proud, duke of Bavaria, to capture Frederick during negotiations failed (1129). Henry the Proud (c 1108 &ndash 20 October 1139) was the Duke of Bavaria ( Henry X, 1126&ndash1139 Duke of Saxony ( Henry However, afterwards supporters of Lothar won a number of victories both in Germany and in Italy. Speyer (1129), Nuremberg (1130) and Ulm (1134) were captured and in October 1134 Frederick submitted to the emperor. In 1135 both Frederick and Conrad were finally reconciled with Lothar. After Lothar's death (1137) and election of Conrad as King of the Romans (1138) Frederick supported his brother in the struggle with Guelphs. Conrad III (1093 &ndash 15 February 1152) was the first King of Germany of the Hohenstaufen dynasty King of the Romans ( Latin: Rex Romanorum) was the title used by the elected ruler of the Holy Roman Empire, the Imperator futurus See also Elder House of Welf The House of Welf (or House of Guelph) is a European Dynasty that has included many German and British According to Otto of Freising, Frederick was "so faithful a knight to his sovereign and so helpful a friend to his uncle that by valor he supported the tottering honor of the realm, fighting manfully against its foes. Otto von Freising ( Otto Frisingensis) (c 1114 in Klosterneuburg – September 22, 1158) was a German Bishop and chronicler . . "

Frederick's second wife, Agnes, was the niece of his old enemy Albert of Mainz.

Children

With Judith of Bavaria (d. 1130 or 1131), daughter of Henry IX, Duke of Bavaria:

Frederick III Barbarossa (1122-1190), duke of Swabia and Holy Roman Emperor as Frederick I
Bertha (1123-1195), married Matthias I, Duke of Lorraine

With Agnes of Saarbrücken (d. Henry IX (died 13 December 1126) called the Black, a member of the House of Welf, was duke of Bavaria from 1120 to 1126 Frederick I Barbarossa (1122 &ndash 10 June 1190) was elected King of Germany at Frankfurt on 4 March 1152 and crowned The Holy Roman Emperor (Römischer Kaiser or Römisch-Deutscher Kaiser Romanorum Imperator was the elected monarch ruling over the many varying numbers of states Matthias I (1119 – May 13, 1176) was the Duke of Lorraine from 1138 to his death as the eldest son and successor of Simon I and Adelaide ~1147):

Conrad of Hohenstaufen (also called Konrad) (1134/1136-1195), Count Palatine of the Rhine
Judith (1135-1191), married Louis II, Landgrave of Thuringia