Robert the Strong
Ranulf I (also "Ramnulf", "Rannulf", and "Ranulph") (820–866) was a Count of Poitiers (from 835) and Duke of Aquitaine (from 852). He is considered a possible son of Gerard, Count of Auvergne. Few details are known about Ranulf I, except that he died in 866 in Aquitaine from wounds received in the Battle of Brissarthe against the Vikings (in which Robert the Strong also died).