Erchempert records that, after the death of "Landulfus" [dated to 879 by the editor of the MGH edition], "nepotes illius" divided Capuan territories among themselves and that "Pandonolfus" took "urbem Tianensem et Casam Irlam", "Lando" took "Berelais et Suessam", "alter Lando" took "Calinum et Caiaziæ", "Atenolfus" took "castrum in Calvo", and that "Landulfum…adolescentulum Landoni filium" was consecrated as bishop. The same passage records that "filii Pandonis" imprisoned "Landulfum et Atenulfum fratres suos, filios…Landonulfi" at "Caiaziac castro".
The Cronica de Monasterio Sanctissimi Benedicti record that "Atenolfus comes" succeeded "mense Ianuario" [dated to 887 by the editor of the MGH edition] as Count of Capua and ruled for 10 years and 6 months, adding that later he also became "princeps Beneventi". Erchempert records that, after the accession of "Atenolfus", he was opposed by "Landone germano eius…cum ceteris fratribus", which passage must refer to Lando [II] ex-Count of Capua (cousin of Atenolf not brother). The Cronica de Monasterio Sanctissimi Benedicti record war between Capua and Naples "in Liburia ad sanctum Cartium" in the second year of Atenolf´s reign, that Atenolf "indictione 6 post dies undecim" captured "Berelais", but that in the same week he was defeated by "Aio princeps [Prince of Benevento] cum quodam patricio Constantinopolitano".
Prince of Benevento: in Jan 900, he deposed Radelchis Prince of Benevento "cognatus eius" and seized the Beneventan throne, after which Benevento was united with Capua and the counts of Capua adopted the princely title. He used the title "Langobardorum gentis princeps" in contemporary sources. According to the "Catalogus Principum Capuæ", "Atenulfus magnus…de comite factus est princeps".
The Annales Beneventani record the death of Count Atenolf in 912. 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. 1
Research Notes: