(Amttmr or Am-my-is-tam-ru) King of Ugarit (Ras Shamra), son of King Niqmepa and Akhat-Milki II, Queen who exercised the Regency during the first years of the reign of Ammistamru II, which could do with power because his older brothers (Hishmi-Sharruma and ploughing-Sharruma) had exiled to Cyprus after being compensated with part of his paternal inheritance.
Ammistamru II, married to a daughter of Benteshina, King of Amurru, has reached numerous documentation which talks about problems of personal: divorce from his first wife, agreed apparently for political reasons and resolved by the decision of Ini-Teshup, King of Carchemish, and Tudkhalijas IV, King of Hatti; new married another Princess of Amurru and subsequent divorce, motivated now by her adulterous relationships. In addition, another series of documents collecting economic and judicial problems that occurred during his long reign, caused by the foreign merchants operating in Ugarit, as well as some aspects of the relationship maintained with other kingdoms of Syria, including Siyannu, controlled by Ari-Teshub and then by Shapili. However, the documentation more important, historically speaking, is diplomatic in character, especially the maintained with the Kings of Carchemish and Hatti. Such powers dispensed to Ammistamru II military obligations towards Assyria, collapsed long ago by an agreement between Mursilis II and Niqmepa, the father of Ammistamru II, in Exchange for monetary compensation (delivery of fifty gold mines), circumstances that, talking of wealth abroad and the scarce Ugaritic war power although it had held some military actions against the Kingdom of Mukishthen he/she had shown itself incapable of controlling the threat of nomadic umman-manda, as it reveals a letter of King muwa-Shaushga of Amurru, Ammistamru II. Important characters of his reign were Rap'anu, which has gone down in history for his extraordinary personal archive; Sinaranu, rich merchant who was Royal Treasurer; Takkhulimu, Mayor of the Palace and favourite of the Queen; and Amtarunu, merchant who controlled the salt flats of the Kingdom and some small towns. King Ammistamru II succeeded his son Ibiranu (legally was be successor to Dell'Utri-Sharruma, the eldest son of the daughter of Benteshina).