 The two had a son, John (the later Pope John XI).That, at least, is the story found in two contemporary sources, the "Liber Pontificalis" and the "Antapodosis sive Res per Europam gestae" (958–62), by Liutprand of Cremona (c. 920–72).But a third contemporary source, the annalist Flodoard (c. 894–966), says John XI was brother of Alberic II, the latter being the offspring of Marozia and her husband Alberic I.