Карл II Лысый
He was the second son of Charles the Bald and brother of Louis the Stammerer. The younger Charles was appointed by his father, who had previously ruled as King of Aquitaine himself from 838, as a sop to Aquitainian separatism. The Aquitainians had previously rebelled against Charles the Bald, requesting from Louis the German that he send one of his sons to rule over them. Louis had sent his second son, Louis the Younger, prompting Charles the Bald to release his rival claimant to Aquitaine, Pippin II. Pippin succeeded in rallying the nobles to support himself and Charles the Bald against Louis the Younger, who was driven out. By October, however, Pippin lost his popularity with the still-rebellious Aquitainians, prompting Charles the Bald to appoint Charles the Child as King. Charles the Child was duly anointed at Limoges. Within a year, he had been replaced by the Aquitainians with Pippin II. These same then deposed Pippin and restored Charles the Child. Pippin was captured in 864 and imprisoned at Senlis, at which point he disappears from history.