Career
Her brother John William inherited the United Duchies of Jülich-Cleves-Berg in 1592. After he had developed a mental illness, a power struggle broke out at court between Sibylle and her sister-in-law Jakobea of Baden. Sibylle may also have been partially responsible for Jakobea"s violent death in 1597.
In 1601, Sibylle married Margrave Charles of Burgau.
In 1610, the couple moved into the residence at Günzburg. She acted in particular as patron of music
Sibylle died in 1628 and was buried next to her husband in the Capuchin Church in Günzburg. When the church was demolished, her remains were transferred to the Saint Martin"s Church, also in Günzburg.