Robert the Strong
In 836, a member of this family, Robert the Strong, sided with Charles the Bald against his brother Lothair I, which led him to leave his Rhine possessions to the Loire Valley, where the king gave him significant counties. The weakness of the Carolingians (minority of Charles the Simple, premature death of Louis IV, Lothair and Louis V), combined with the energy of the Robertians both before the face of the Norman invaders and of royal power is beginning of the rise in power of the line of Hugh Capet.