Bāzāyu was the fifty-second ruler of Aššur according to the Assyrian King List [http://oracc.museum.upenn.edu/riao/kinglists/assyriankinglist/index.html] (AKL). That text also records that he sat on the throne for twenty-eight years and was the son of Bēlu-bāni [http://oracc.museum.upenn.edu/riao/fromsamsiaddutomittanicilent18081364bc/belubanidynasty/belubani/index.html]. If this proves correct, then he succeeded his great-nephew Iptar-Sîn [http://oracc.museum.upenn.edu/riao/fromsamsiaddutomittanicilent18081364bc/belubanidynasty/iptarsin/index.html]. Bāzāyu was immediately followed by Lullāyu [http://oracc.museum.upenn.edu/riao/fromsamsiaddutomittanicilent18081364bc/belubanidynasty/lullayu/index.html], "a son of a nobody," thus briefly interrupting the Bēlu-bāni [http://oracc.museum.upenn.edu/riao/kinglists/assyriankinglist/index.html#Section5-7] family's control of the Assyrian throne.
Poppy Tushingham
Poppy Tushingham, 'Bāzāyu', The Royal Inscriptions of Assyria online (RIAo) Project, The RIAo Project, a sub-project of MOCCI, 2021 [http://oracc.museum.upenn.edu/riao/fromsamsiaddutomittanicilent18081364bc/belubanidynasty/bazayu/]