Išme-Dagān II, son of Šamši-Adad II [http://oracc.museum.upenn.edu/riao/fromsamsiaddutomittanicilent18081364bc/belubanidynasty/shamshiadadii/index.html], ruled Assyria for sixteen years (during the so-called Assyrian 'Dark Age'). According to the Assyrian King List [http://oracc.museum.upenn.edu/riao/kinglists/assyriankinglist/assyriankinglist/index.html#BelubaniDynasty] (AKL), two of his sons sat on the Assyrian throne: Šamši-Adad III [http://oracc.museum.upenn.edu/riao/fromsamsiaddutomittanicilent18081364bc/belubanidynasty/shamshiadadiii/index.html] and Aššur-nārārī I [http://oracc.museum.upenn.edu/riao/fromsamsiaddutomittanicilent18081364bc/belubanidynasty/ashurnararii/index.html]. No inscriptions of Išme-Dagān II have yet been discovered.
Yehonatan Hershkovitz
Yehonatan Hershkovitz, 'Išme-Dagān II', The Royal Inscriptions of Assyria online (RIAo) Project, The RIAo Project, a sub-project of MOCCI, 2017 [http://oracc.museum.upenn.edu/riao/fromsamsiaddutomittanicilent18081364bc/belubanidynasty/ishmedaganii/]