or ABBO CERNICUS, 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.

or ABBO FLORIACENSIS, a learned Frenchman, born in the vicinity of Orleans, in the year 945. He was educated at the schools of Paris and Rheims, where he greatly distinguished himself; and devoted himself with great ardour to the study of all the sciences of his time. In 970, he was chosen abbot of the monastery of Fleury, of which he was a monk; and was engaged in disputes with several of the bishops of his time in defending the rights of his order. In 986, and again in 996, he was sent by King Robert to Rome, in order to appease the pope, who had threatened to interdict the kingdom, and on both occasions he was successful. He was killed in 1004, while endeavouring to quell a tumult between two contending parties of French and Gascons. His chief works were the Lives of the Popes, published in 1602, and some collections of canons, letters, &c.