Frederick, Duke of Lower Lorraine
Frederick of Luxembourg (c. 1003 – 18 May 1065) was the count of Malmedy
Malmedy is a municipality of Belgium. It lies in the country's Walloon Region, Province of Liège. It belongs to the French Community of Belgium, within which it is French-speaking with facilities for German-speakers. On January 1, 2006 Malmedy had a total population of 11,829...

 from 1035 and duke of Lower Lorraine from 1046. He was a younger son of Frederick, lord of Gleiberg
Frederick of Luxembourg
Frederick of Luxembourg , count of Moselgau, was a son of count Siegfried of Luxembourg and Hedwig of Nordgau.By a wife whose name is unknown , he had:...

, and Ermentrude, and grandson of Siegfried, Count of Luxembourg, hence his name.

In 1044, Gothelo I
Gothelo I, Duke of Lorraine
Gothelo , called the Great, was the duke of Lower Lorraine from 1023 and of Upper Lorraine from 1033. He was also the margrave of Antwerp from 1005 and count of Verdun. Gothelo was the youngest son of Godfrey I, Count of Verdun, and Matilda Billung, daughter of Herman, Duke of Saxony...

, dukes of both Lorraines, died and his eldest son, Godfrey
Godfrey III, Duke of Lower Lorraine
Godfrey III , called the Bearded, was the eldest son of Gothelo I, duke of Upper and Lower Lorraine. By inheritance, he was count of Verdun and he became margrave of Antwerp as a vassal of the duke of Lower Lorraine...

, succeeded in only the upper duchy while the Emperor Henry III first threatened to give the other duchy to his younger (incompetent) brother, Gothelo II. Because of the rebellion of Godfrey, Henry III appointed Frederick, a relative of the reigning duke of Upper Lorraine, Adalbert.

With the aid of Adalbero III, Bishop of Metz, his brother, Frederick imposed his authority in the duchy and made war on the continuing rebel Godfrey. He was loyal to the emperor, but unsuccessful in the field and Henry began parcelling out portions of the duchy to more capable warriors. He died in war with Anno II, Archbishop of Cologne, afer which King Henry IV
Henry IV, Holy Roman Emperor
Henry IV was King of the Romans from 1056 and Holy Roman Emperor from 1084 until his forced abdication in 1105. He was the third emperor of the Salian dynasty and one of the most powerful and important figures of the 11th century...

 gave the duchy to Godfrey.

His first wife was Gerberga (died c. 1049), daughter of Eustace I, Count of Boulogne. They had a daughter named Jutta, who married Waleran, Count of Arlon. His second wife (1055) was Ida (died 1102), daughter of Bernard II, Duke of Saxony
Bernard II, Duke of Saxony
Bernard II was the Duke of Saxony , the third of the Billung dynasty, a son of Bernard I and Hildegard. He had the rights of a count in Frisia....

, who remarried with Albert III, Count of Namur, on Frederick's death.
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