Research Notes:

The Annales Elnonenses Minores record that "Arnulfus, filius Balduini ex Matilde" succeeded his grandfather in 964 as ARNOUL II “le Jeune” Count of Flanders, under the guardianship of his father's first cousin Baudouin Baldzo [de Boulogne] who made himself Comte de Courtrai. Taking advantage of the weakness of the county during Count Arnoul's minority, [his uncle] Dirk II Count of [Holland] captured Gent and Waas, and Lothaire King of the West Franks occupied the south-east of the county, ostensibly in the role of protector of the young count. To counter the perceived threat from France, Emperor Otto II established marches on the right bank of the river Schelde, from Valenciennes in the south to Antwerp in the north.

"Godefridi comitis, Ingelberti advocati, Arnulfi junioris marchysi…" signed the charter dated 11 Apr 969 under which "Theodericus comes" donated "sui iuris possessionem…Frilingim in pago Flandrensi" to Saint-Pierre de Gand. "Arnulfus…marchysus" confirmed the possession of "Harnas…in pago Seirbiu" to Saint-Pierre de Gand by charter dated 31 Jan 972, signed by "Theoderici comitis…Arnulfi Bononiensis comitis, Engelberti advocati…". "Arnulfi…junioris marchysi, Herimanni comitis filiis Godefridi comitis, Wiggeri, Ingelberti advocati…" signed the charter dated [21 Jan] 974 under which "Godefridus comes et uxor sua Mathildis" donated "regium fiscum Holinium…in pago Tornacensi…et…Ramelgeis ecclesia…" to Saint-Pierre de Gand. "Arnulfo juniore marchyso…" signed the charter dated 2 Oct 974 under which "Theodericus comes et uxor sua Hildegardis" donated "in villa Haleftra in pago Mempesco sita" to Saint-Pierre de Gand. Arnoul's majority was declared in 976.

The Annales Blandinienses record the death in 989 of "Arnulfus marchysus, nepos magni Arnulfii". ²