The Chronicle of Adémar de Chabannes records that the testament of "Willelmus Sector ferri" was signed by "…Arnaldus filius Willelmi, Adhemarus filius Willelmi", another manuscript stating that he had no children by his wife and that these two sons were born "ex concubinis". Ademar names Arnaud son of "Willelmi Sectoris-ferri", recording that he defeated and killed his second cousin Ranulf "Bompar" in 975, succeeding as Comte d'Angoulême. The Historia Pontificum et Comitum Engolismensis records that, after the death of “fratre eius Guillelmo” (“eius” referring to “Arnaldus cognomento Borrario”), “Rannulfus Bonparus” was killed by “Arnoldo Manzere, id est, adulterino filio Guillelmi Sectoris-ferri” who gained control of “principatum Engolismæ”.
The Chronicle of Adémar de Chabannes records that "Arnaldus…comes Engolismensis" abdicated in 988 in favour of his son Guillaume, took the monastic habit at "ecclesia Buxensi sancti Amancii" and entered the monastery of "sancti Eparchii" [Saint-Cybard] where he was buried "IV Non Mar" next to his father. 2
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