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Birth:          1090 of Hohenstaufen, Swabia, Bavaria
Death:          6 Apr 1147 
Burial:         St. Walpurgia, Alsace

Notes
https://en.wikipedia.org/wiki/Frederick_II,_Duke_of_Swabia
Frederick II (1090 – 6 April 1147), called the One-Eyed, was Duke of Swabia from 
1105 until his death, the second from the Hohenstaufen dynasty. His younger brother 
Conrad was elected King of the Romans in 1138.
Life[edit]

Frederick II was the eldest son of Duke Frederick I of Swabia and his wife Agnes of 
Waiblingen, a daughter of the Salian emperor Henry IV. He succeeded his father in 
1105 and together with his brother Conrad continued the extension and consolidation 
of the Hohenstaufen estates. Frederick had numerous castles erected along the Rhine 
river and in the Alsace region.

The Hohenstaufen brothers supported King Henry V in the conflict with his father 
Emperor Henry IV; Frederick also accompanied him on his campaign against King 
Coloman of Hungary in 1108. In 1110 he and Henry V embarked on an expedition to 
Italy, where in Rome Henry enforced his coronation by Pope Paschal II. In turn, the 
emperor appointed Conrad Duke of Franconia and both brothers German regents when 
he left for his second Italian campaign in 1116. On the other hand, the rise of the 
Hohenstaufens began to upset rivalling princes like Archbishop Adalbert of Mainz, 
who loathed the supporters of Henry V.[citation needed]

About 1120 Frederick married Judith, a daughter of Duke Henry IX of Bavaria and 
member of the powerful House of Welf. Their first son Frederick was born in 1122.

Upon the death of Emperor Henry V in 1125, the Salian dynasty became extinct. 
Frederick II, Henry's nephew, stood for election as King of the Romans with the 
support of his younger brother Conrad and several princely houses. However, he lost 
in the tumultuous round of elections,[citation needed] led by Archbishop Adalbert of 
Mainz, to the Saxon duke Lothair II. Frederick at first rendered homage to the new 
king, however, he refused the feudal oath and insisted on the inheritance of the 
Salian family estates along the Middle Rhine.

At the 1125 Hoftag diet in Regensburg, the king officially requested the surrender of 
the Salian possessions. After he imposed an Imperial ban on the Hohenstaufens, the 
conflict erupted between Frederick and his supporters, and Lothair: encouraged by 
Archbishop Adalbert and several princes, the king occupied Hohenstaufen lands in 
Upper Lorraine and Alsace. However, an attack by Welf forces on the Swabian core 
territory failed, like the siege of Nuremberg by Lothair in 1127. Frederick relieved the 
siege and moreover gained the support from his brother Conrad, who had just returned 
from a pilgrimage to the Holy Land. During the fighting, Frederick lost an eye, 
whereafter he was no longer eligible as German king.[citation needed]

In December 1127 Conrad declared himself King of the Romans, while the next year 
Duke Frederick II occupied the Salian city of Speyer. The attempt of Duke Henry X of 
Bavaria to capture his brother-in-law Frederick during the negotiations failed. 
However, afterwards the supporters of Lothair won a number of victories both in 
Germany and in Italy. Speyer (1129), Nuremberg (1130) and Ulm (1134) were captured; 
moreover Frederick's consort Judith of Bavaria died in 1130. His second wife, Agnes 
of Saarbrücken, was a niece of his old enemy Adalbert of Mainz; Frederick married her 
about 1132.

After Lothair was crowned emperor in 1133, Frederick saw himself stuck between the 
Saxon and Bavarian forces. He eventually submitted to him in the spring of 1135 at 
Bamberg. Both were finally reconciled and Emperor Lothair renounced further attacks 
against the Hohenstaufens. After Lothair's death in 1137 and the following election of 
Conrad as King of the Romans, Frederick supported his brother in the struggle with the 
Welfs. 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..."

Duke Frederick II died in 1147 at Alzey. He was buried at the Benedictine abbey of 
Walburg in Alsace. His son Frederick succeeded him as Swabian duke and was 
elected German king (as Frederick Barbarossa) in 1152.

Marriage and children[edit]

With Judith of Bavaria (1103- 22 February 1131), daughter of Henry IX, Duke of 
Bavaria:
Frederick III Barbarossa (1122–1190), duke of Swabia and Holy Roman Emperor as 
Frederick I
Bertha (Judith)[1] (1123–1195), married Matthias I, Duke of Lorraine

With Agnes of Saarbrücken (d. c.?1147), daughter of Frederick, Count of 
Saarbrücken:
Conrad of Hohenstaufen (also spelled Konrad) (1134/1136-1195), Count Palatine of 
the Rhine
Jutta (1135–1191), married Louis II, Landgrave of Thuringia

Parents
____ Frederick (Friedrich) I (ABT 1050 - 6 Apr 1105)
OF FRANCONIA Agnes (ABT 1073 - 24 Sep 1143)

Siblings
VON HOHENSTAUFEN Friedrich II (1090 - 6 Apr 1147)

Marriage To OF BAVARIA Judith (19 May 1100 - 27 Aug 1130)
    m. 1121 

Notes

Parents
____ Henry (Heinrich) (Welf) IX "the Black" (1074 - 13 Dec 1126)
OF SAXONY Ulfhild (Wolfhildis) (1072 - 29 Dec 1126)

Children by OF BAVARIA Judith 19 May 1100 - 27 Aug 1130
____ Frederick (Friedrich) III "Barbarossa" (1122 - 10 Jun 1190)
VON HOHENSTAUFEN Judith (occ. Bertha) (EST 1124 - )

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