 The noble family possibly descended from Count Palatine Wigeric of Lotharingia (d. before 923), the founder of the Ardennes-Verdun dynasty.His presumable son Sigfried (d. 997) appeared as first Count of Luxembourg about 950.Sigfried's grandson Giselbert (d. 1059), is documented as a Count of Salm in 1036 and as Count of Luxembourg in 1047.