Ranulf I (also Ramnulf, Rannulf, and Ranulph; 820–866) was a Count of Poitiers (from 835) and Duke of Aquitaine (from 852). He is the 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).
Ranulf Higden or Higdon (c. 1280 – 1364) was an English chronicler and a Benedictine monk who wrote the Polychronicon, a Late Medieval magnum opus. Higden, who resided at the monastery of St. Werburgh in Chester, is believed to have been born in the West of England before taking his monastic vow at Benedictine Abbey in Chester in 1299. As a monk, he travelled throughout the North and Midlands of England, including Derbyshire, Shropshire and Lancashire.