The origins of the Salian dynasty can be traced back to Count Werner V of Worms, a Frankish nobleman from the Duchy of Franconia to the east of the Rhine River. His son, Conrad the Red, succeeded him as Count in 941. King Otto I (the future Holy Roman Emperor) elevated him to Duke of Lorraine in 944. He subsequently married Liutgarde, one of Otto's daughters, in 947 and rose to become one of the king's closest allies. The relationship, however deteriorated, when Otto refused to honor a peace treaty Conrad, as Otto's representative, had negotiated with Berengar II of Italy. Conrad also resented the growing influence of Otto's brother Henry I of Bavaria, whom he regarded a threat to his position. In 953 Conrad joined the king's son Liudolf in rebellion against Otto. The rebellion was crushed and Conrad was stripped of his ducal title. Conrad and Otto eventually reconciled. Conrad fought alongside Otto and fell in the decisive Battle of Lechfeld in 955 that put an end to the Hungarian invasions into Europe. Conrad was succeeded as Count of Worms in 956 by his son Otto of Worms, who was also the grandson of Otto I. In between 965 and 970 Otto of Worms' first son and Conrad II's father Henry of Speyer was born, of whom only very little is known. He died at the age of 20 between 985 and 990. Conrad II's mother was Adelaide of Metz. After Henry's death, Adelaide married a Frankish nobleman and the relationship with Conrad declined.