Ragenar was the bishop of Amiens from 830 to 833 and again from 834 until his death in 849. His predecessor, Jesse, was initially deposed by the Emperor Louis the Pious in 830 for conspiring with his rebellious son Lothair. In 833 he was restored when Lothair forced his father to make public obeisance at an assembly in Soissons. When Louis regained his position in 834, Jesse was again deposed and this time exiled to Italy, where he died in 836.