Princely Brothers and SistersIn Princely Brothers and Sisters, Jonathan R. Lyon takes a fresh look at sibling networks and the role they played in shaping the practice of politics in the Middle Ages. Focusing on nine of the most prominent aristocratic families in the German kingdom during the Staufen period (11381250), Lyon finds that noblemenand to a lesser extent, noblewomenrelied on the cooperation and support of their siblings as they sought to maintain or expand their power