"Arechis II (also Aretchis, Arichis, Arechi or Aregis) (died 26 August 787) was a Duke of Benevento, in Southern Italy. He sought to expand the Beneventos´ influence into areas of Italy that were still under Byzantine control, but he also had to defend against Charlemagne, who had conquered northern Italy." - (en.wikipedia.org 18.05.2020)