How did Luxembourg get its name?

The tiny country Luxemburg got its name from a castle, which dates back to the Roman Empire. The castle became the residence of the counts of the Ardennes 963, which from 1083 was called the county of Luxemburg. Its count Henri VII was elected to German king 1308 and his dynasty became one of Europe's most powerful houses, among others were Bohemia and Hungary part of the Luxemburg dynasty's possessions. It was during this time Luxemburg was elevated to a duchy (1354). Because of Wenceslas II's financial difficulties was Luxemburg pawned 1388. The rulers of Luxemburg styled themselves as dukes but Wenceslas and his descendants continued to use the title duke of Luxemburg. This meant that there were two kind of Luxemburg dukes during the period 1388-1457, hereditary dukes (duc héréditaire) and actual regents (duc par engagère). Luxemburg became a part of the Burgundian lands 1457 and shared their fate until the Belgian revolt 1830. The French speaking part of Luxemburg joined Belgium as a province while the smaller German speaking part became an independent state in a personal union with The Netherlands. The union was dissolved 1890 due to different succession laws. Before that had Luxemburg been elevated to a grand duchy at the congress in Vienna 1814.