Regnal year dating
He was installed as ZOTTO Duke of Benevento in [583/84].
Paulus Diaconus names "primus Langobardorum dux in Benevento Zotto" stating that he ruled the principality for 20 years, son of --- (-).
By the early 9th century, the principality of Benevento had expanded to include most of Puglia and Calabria.
Prince Sicard concluded a peace agreement with the duchy of Naples in 836, and in 838 conquered Amalfi.
It is possible to assess the geographical extent of the principality of Benevento in the early 11th century from a bull of Pope Benedict VIII dated 1014, which named the towns of Bovino, Ascoli, Larino, Trivento, Lucera, Sant Agata, Avellino, Ariano, Vulturaria, Telese, Alife, Sessula, Lesina, Termoli, and Siponto, as well as the region of Gargano, within the principality.
He deposed King Godepert and installed himself as .
The same source records that he avenged the murder of his older brothers by destroying the city of Opitergium, where they had been killed, and distributing its territories between Friulia, Tarvisium and Ceneta.
Paulus Diaconus also states that Lupus Duke of Friulia rebelled against King Grimoald but was defeated with the help of the Avars, who refused to return home until King Grimoald began assembling an army against them, but this report must be inaccurate as King Dagobert only succeeded as king five years after Grimoald died.
The first recorded Lombard duke of Benevento was Zotto.
Arichis II Duke of Benevento proclaimed himself Prince of Benevento in 774, as sole Lombard ruler in Italy after the Lombard Italian kingdom was incorporated into the Frankish domain following the defeat of Desiderius King of the Lombards.