William left 15 children, including seven sons: Ernest, Christian, Augustus, Frederick, Magnus, George, and John. In 1592, all the brothers agreed to entrust the government of the whole realm (with limitation) to Ernest, initially for eight years, and in 1600 for a further ten. Then in 1610, they agreed that the Principality of Lüneburg and all its dependencies should be his and his descendants as an indivisible whole. However, after Ernest's death in 1611, and given the difficulty of ever new divisions, the remaining brothers made another agreement in 1612. Under this new arrangement, each of the brothers would exercise power in succession, but only one of them would marry a woman of appropriate rank (so only their children could inherit). This would continue the ducal lineage and maintain the unity of the Principality. They drew lots: the lot fell to the second youngest brother, George, who married Anne Eleonore of Hesse-Darmstadt in 1617.