1 better known under the name of Belˆsme, was son of Fulcoin and Rothais, and is described as a man wise and prudent. He was in possession, toward the end of the year 940, of the town of Belˆsme, but not of the county of Perche, which he appears never to have been in possession of, at least not of the whole of it. He can be better called owner of the Canton of Sonnois. He was brother of Sigenfroi, Bishop of Mans.
It was by the counsel of Yves, that Osmond, in the year 942, saved from the hands of King Louis d'Outremer, young Richard, Duke of Normandy, whom this prince had retained a prisoner at Laon. Many modern writers place his death in A.D. 980, but it is certain that he was yet living in the reign of King Robert. He died towards the end of the year 997. Some years before his death, and in 994 or later, he had lost a portion of the Sonnois, which Hugh I., Count of Maine, had despoiled him of.