Jocundus, a Lotharingian chronicler writing in the 1070s, recorded that Gerberga was the driving force behind Gilbert's decision to support her younger brother Henry when he rebelled against her older brother Otto I c. 936.
A chronicler from the region of Lotharingia, Jocundus, who wrote in the late 10th century, stated that Gerberga was the driving force behind Gilbert's decision to support her younger brother Henry during his rebellion against their older brother Otto I around 936.