In 819 [his father] was created Count Rennes.
In 832 [his father] was created I Count Maine.
On 16 Jun 840 [his father] died. His brother [his uncle] succeeded I Count Maine.
In 853 Rorgon Rorgonide II Count Maine (age 53) succeeded II Count Maine.
Around 865 Rorgon Rorgonide II Count Maine (age 65) died. His brother [his brother] succeeded Count Maine.