House of Luxembourg founded by Henry V, Count of Luxembourg
Earlier Luxembourg counts
The royal House of Luxemburg are named after their ancestors in the Luxembourg branch of the earlier House of Ardenne (or Ardennes, French Maison d'Ardenne). This was an important noble family from Lotharingia, known from at least the tenth century. They had several important branches, descended from several brothers:
The House of Ardenne–Luxembourg, including the counts of Luxembourg, descended from Count Sigfried of Luxembourg
The House of Ardenne–Verdun, with several dukes of Lower Lotharingia, descended from Count Gozlin of Bidgau
The House of Ardenne–Bar, with several dukes of Upper Lotharingia, descended from Duke Frederick I of Upper Lorraine.{{chart top|The Luxembourg ancestry of Henry V, count of Luxembourg, ancestor of the royal house of Luxembourg