​Abbo Cernuus, ("the crooked"), a French Benedictine monk of St-Germain-des-Prés in Paris, sometimes called Abbo Parisiensis. He was born about the middle of the ninth century, was present at the siege of Paris by the Normans (885–86), and wrote a description of it in Latin verse, with an account of subsequent events to 896, "De bellis Parisiacæ urbis." He also left some sermons for the instructions of clerics in Paris and Poictiers (P.L., CXXII). His death took place after 921.