Rudolf accompanied their sister to the court of her husband, Louis the Pious, where their ambitious spirit maintained their hereditary rank, and where they shared the happy, as well as the adverse fortunes of that sister. When Judith was surprised and confined by her stepsons, her brothers were shaven as monks but claimed and obtained permission to stand beside the throne. Judith's sister Hemma (* 808 † 876) later married Judith's stepson Louis the German and became Queen of the Franks. Conrad had two sons: Conrad II, who succeeded him; and Hugh, from his church preferment, styled the Abbot. He is traditionally given a third son, Welf I of the Swabian group. Conrad II succeeded his father as Count of Paris, and recovered the Burgundian estates of his grand-uncle Otkarius. He left an only son Rudolph who assumed the royal crown at the abbey of St Maurice en Valais in 888, who confirmed his independence with two victories over Arnulf, and was then acknowledged emperor in a general diet of the empire. His son, Rudolph II succeeded to this new-formed state, which included the French or western part of Switzerland, Franche-Comté, Savoy, Dauphiné, Provence, and the country between the Rhine and the Alps, and was known as the kingdom of Burgundy. He twice attempted the conquest of Italy, and for a period of three years governed that kingdom. His son and successor, Conrad III, reigned more than fifty-six years from 937 to 993 and enjoyed the friendship and support of the Saxon emperors. Otto I married his sister Adelaide, who was the mother of Otto II, and the grandmother of Otto III. Conrad was succeeded by his son Rudolph III, surnamed the Lossy. When Rudolph III died childless in 1032 without issue the sovereignty of the kingdom of Burgundy devolved as a fief or legacy to his nephew Conrad of Swabia, who was elected emperor in 1024. With Rudolph, this branch became extinct in the male line. The last member of the Burgundian group was King Rudolph III of Burgundy, who died childless in 1032. Notable members of the Burgundian group Welf, Count of Altdorf Judith, daughter of Welf, Empress Rudolph I, King of Burgundy Rudolph II, King of Burgundy Conrad I, King of Burgundy Gisela of Burgundy Adelaide of Italy Rudolph III, King of Burgundy Swabian group The oldest known member of the Swabian group was Welf I, a