ABBON, or ABBO CERNUUS, a monk of Saint Germain-des-Prés, who flourished towards the end of the 9th century. He wrote an epic poem in Latin on the siege of Paris by the Northmen in 886-7, of which he was an eye-witness. As a poem his work is of little value; but it is of considerable importance to the historian, as being an accurate narrative of the event.