• Born: Est 885, Benevento, Napoli, Italy
• Married: Between Jan 898 and Feb 898
• Died: 10 Apr 943, Capua, Napoli, Italy

  Research Notes:

According to the "Catalogus Principum Capuæ", "Landulfus I eius filius" ruled jointly with his father and, after his father's death, jointly with his brother Atenulf II. The Cronica de Monasterio Sanctissimi Benedicti record that "Atenolfus comes" left Capua to "filiis suis domno Landolfo et domno Atenolfo". Landolf visited Constantinople to seek military help in Capua's struggle against the Arabs and was invested as patricius.

According to the Annales Beneventani, "Landulphus filius Atenolfi" was installed as Prince of Benevento in 902, but the extent to which he may have governed Benevento separately from Capua is unclear. The Annales Beneventani record that he succeeded his father in 912 as LANDOLF III joint Prince of Capua and Benevento, jointly with "Atenulfo germano suo et filii eorum". The Chronicon Vulturnense records a charter dated Nov 914 "quinto anno patriciatus domni nostri Landulfi…et quinto anno domni nostri Athenulfi principis", which suggests either that the date of death recorded by the Annales Beneventani is incorrect or that their father Atenolf associated his two sons in the government of his territories three years before he died. He participated in the joint Capuan, Beneventan and Salernitan expedition which removed the Arab settlement from the mouth of the River Garigliano in 915. He was granted the Byzantine titles antipatos and patrikios in [914/early 916]: the Chronicon Vulturnense records that "Landulfus…et Athenulfus Langobardorum gentis Antipatus Patricius et Patricius" confirmed the possessions of Volturno "in finibus Venafranis" by charter dated 10 Jul 916. He and his brother invaded Byzantine Apulia in [921], captured the castrum of Ascoli and killed the Byzantine strategos. "Iohannes consul et dux" [Duke of Naples] signed a pact with "domno Landolfo et domno Atenolfo seu et domno Atenolfo principibus, filiis et nepos domni Atenolfi principis" (Princes of Benevento and Capua) promising mutual help, among other things, against Sarracen attacks, dated to [Mar 933/939]. On the accession of the minor Gisolf I Duke of Salerno in 946, Prince Landolf prepared to invade Salerno together with Ioannes III Duke of Naples, but they were repulsed by the Salernitans with support from Amalfi.

The Chonicon Monasterii Beneventani records the death in 941 of "Atenolphus frater Domni Landulfi" and in 943 of "Landulphus Antipater frater eius". ¹