Atham II Arcoung (Atham Pharlex Arcoung, IPA: /ˈæθəm ˈfaːlɪks ˈaːkʊŋ/), also called Atham the Ancient, was a king of Lokren in the second century AD. He was installed as king by the Army of Siladent at the end of the Barons' Revolt, since at the time he was the Gerouget and the eldest son of Duke Vyncent Arcoung of Siladent Forest, whom the barons wished to placate after their refusal to disband at the duke's order. Atham reigned for a long time, remaining king until his death in 143 AD.